*

## Wednesday, 6 May 2020

### Model on outbreak stages classification: May updates

It has been 20 days since I last posted my analysis on the pandemic using a test count vs positive rate model. Here are some quick updates, particularly from those countries that I posted last time.

For graphs below, the "new parts" are indicated by a thicker line, starting from Apr 15 up to 5/6 May.

For further reference this is my first analysis

Classification of outbreak stages by variation of test count and positive rate

*

Stage 2->3

Pretty scary, right?

Strictly speaking, the positive rate that we are using is not the positive rate respective to the group we tested. Instead it is the ratio between confirmed case and testes case on that day.

In wealthy countries, tests are supposed to be done now within hours since we do not rely on DNA tests anymore, so such statistics would somehow reflect the positive rate of the day. In less developed countries however, this is less reliable.

Theoretically, a "positive rate" of above 1, even after smoothing, is possible though not sustainable. It means some delayed tests returned positive. Apparently this is not the case for Ecuador here. In the raw stats, both the test count and the confirmed count spikes quite often -- a big spike that cannot be wiped out by taking week average.

But such fault does not change the trend after all. We can see that Panama enters stage 3 with their extended tests. Meanwhile Ecuador could be still in stage 2 considering that the last spike only occurred 1 week ago (11183 -> 22719 on 27/4), we are still experiencing the drop as the spike moves out of affection. The daily confirmed case shows no signs of improvements, so I doubt things are under control for now.

Mexico is actually another country with spikes in their raw data so that the positive rate rockets above 1. The more worrying news is, they failed to expand the testing scale to cope with the emerging cases!

Stage 3->4

Once countries enter stage 3 it is almost sure that the countries did take proper measures, so as long as they do not lift the lockdown too early things will go improve.

Italy's 50000 daily test count is enormous given its size, but also understandable given how bad the outbreak was. It is certainly working and the positive rate drops vertically. She's in the end of stage 3 and will enter stage 4 once the testing capacity is in excess.

Indonesia is seeing similar improvement. Early spikes are due to religious events, but there was never an uncontrolled outbreak. With their testing capacity gradually improving they will enter stage 4 soon, too.

Stage 4

These are models for reference -- what happens after gaining full control over the virus?

Estonia is a rare example in Europe that avoided a full-scale outbreak. She's able to slowly put out the virus with constant testing.

New Zealand, who announced an early lockdown, is close to a full elimination. She's now ready to re-open again, but the test is not going to stop anytime soon to prevent any accident.

Canada was under the risk of favoring weather for the virus, but she proved that proper antivirus measures definitely helps regardless of the environment. I would say it is stage 2 to 3.

US is definitely improving. Not necessarily nationwide but at least for most states, including New York. We expect similar development for the rest of the states, but things may change if the governor decides to lift the ban early. US is surely in stage 3.

Russia: I mentioned last time that it is weird to see the outbreak with extensive tests -- the test count is even comparable with US! But now we know why is that the case. It is the poorly treated foreign labours, similar to what happened to Singapore (but well, Singapore provided no data). Russia is in stage 1 to 2.

Japan and UK

Two countries that are not tackling the virus like the rest of the world, so I was really curious what would happen next after I wrote my last analysis. Here are the result.

UK: well, apparently their limited hospital capacity did not limit their will to test more. They drop along the "isotherm" (green line) meaning that they have a constant rate of daily confirmed case, but the outbreak potential is slowly declining because there are less hidden patients now. Unfortunately the damage has been done, and UK is one of the most severely infected country in Europe. UK is in stage 3 and it takes some time before they reach stage 4.

Japan: probably the only well-developed country that does not really like testing. Although the emergency state order is not as restrictive as in other countries, the society slowly adopted the right measure and the outbreak somehow dies down. Everything seems to work in wonder, but I would not say Japan is out of danger really...

*

So that's all for me today. I don't think another update is necessary, but we will see. With outbreaks currently occurring in South America, the globe's economic nightmare is far from over.

Ref.

[1] Total confirmed cases vs total tests conducted, retrieved 6 May 2020.

## Friday, 1 May 2020

### 夢．十夜 (X4.5) Hot Spring Trip

「你剛才在偷拍我吧？」少女一副氣鼓鼓的樣子，似乎剛打出來的成績並沒有為她帶來太多愉悅。

「難得你進入狀態這麼可愛就忍不住拍了啊～哎呀別打－－」

「彈完新出來的練習曲10-4和E小調華爾滋以後就會忍不住彈其他蕭邦曲子呢。我本來想去打中二(CHUNITHM)解鎖『長野勢』稱號的，現在剩半小時時間不夠了啦。」

「嘛～每首三首加起來七分鐘，要打三道還是可以的。」

「才不要。打完nos(ノス)去打中二的話指法會變得奇怪，我肯定打不好的。」

「……卡拿來，我幫你打好了。」「……嗯，不過掉rating你就死定了。」

*

GPS的高度計停了在九百米左右，外面也從暗角有積雪變成路邊厚厚的一層。接送車停了在上信越高原國立公園的門口，司機確認大家的目的地都一樣後便向溫泉村深處出發。

……等下選錯酒可別怪我喔。少年心中如此默念。

*

*

「剛才的晚餐如何？」我望向旁邊還在發呆的少女問道。

「……好想再吃一次啊。」面對高級料理頗為挑剔的她給出簡潔有力的評價：「大量採用時令在地食材就是自信的證明，簡單的調味但不尋常的配搭將食材本身的味道完全展現了出來。吃下去就會覺得『只有這裡才有的味道』，就算想抄回去自己做也做不來，果然抓住客人的胃就是抓住客人的心呢－－」

*

「我看到一篇Reddit上說希望大壓制戰裡增加溝通和求援功能的帖子，被罵得很慘呢。」一如遊戲殘缺的交友系統，這種高度策略性的活動居然沒法跟任何其他隊員交流。這樣玩家認真打的動力就更少了：「所以我朋友就弄了一個大壓制戰的戰棋版，我們正在調較參數呢。」

「如果改成戰棋的話，戰鬥變成某幾塊領地的集中對抗吧。這樣的戰棋不太好玩吧。」每次大壓制戰的地圖都略有不同，那都是按本傳裡的地圖改編的。這就決定了部分領地在成了min-cut(最小割)理論中的橋頭堡，大部分回合的戰鬥都會圍繞這些領地而展開。

「不過這遊戲也不完全是線性呢。同隊不同玩家都在同一領地上戰鬥的話會有倍數加成，我們把它簡化成每個行動都屬於不同玩家就好了。另外我們把地圖設計成有多個min-cut(最小割)解的話玩家就沒法大量投入兵力在某幾個領地了呢。」

「可是大壓制戰裡面每隊玩家可以投入的資源跟領地多寡無關吧。這樣會不會到最後形成消極平衡？」多人零和遊戲本來就自帶恐怖平衡。問題是如果這種打法偏偏是最優解的話這遊戲就失去博奕的意義了。

「這樣平衡會以另一種形式出現吧？誰佔領了中間都好，玩家也可以自行調節外圍的領土分佈達成平衡啊。」

「你還真是喜歡這招呢。」

「是啊，畢竟這是網遊的精髓所在呢。能用錢買到的東西大家用錢就能拿到，要動腦的的東西卻不是大家動腦就能得到的呢。」

「嗯，怎麼你發呆了啦？」她抬頭向上仰，清澈的雙眼直視我稍稍發燙的臉龐。

「……沒甚麼，看到你這麼開心就好。」

「先旨聲明一下哦，這家旅館真的很棒。食物和服務無可挑剔，建築的話我搜了一下才知道是那個設計加賀屋的山本勝昭的出道作。如果C97那個時候可以給六十分的話現在可以給個八十五分啦。所以……」她有點欲言又止：「謝謝啦。」

「呵呵，大小姐居然也會道謝呢。比起那個，明天想去繼續找美食、還是去看雪景呢？」畢竟是長野那個嶺上怪物的老窩，多走走的話麻雀功力可能會進步。

「你喜歡就好了啦，但不要跟我說去新潟去喝酒……」

「放心，長野也是產酒大縣，要找好酒才不用跑那麼遠呢。不過既然都說我喜歡就好～那你覺得我現在想要的是甚麼呢？」我抱著她的雙手更用力了，隱約間感受到她嬌羞的顫動。

「……」

「我想要……」我在她耳邊低喃：「妳……」

「討、討厭……」

…………
……

**

FEH大壓制戰有變種成桌遊的潛力嗎？其實要解決的技術問題很多。首先當然是資源固定會鼓勵消極戰術這一點，然後是每回合可用的棋子數可能要到一百以上才會比較多戰術變化，最後當然是將時間效率抹消這一點－－在實際活動裡不時發生兩隊實時在同一塊領地上死拼，但其中一隊刷分比較快硬生生將領地打爆的事情，顯然這在桌遊版上很難發生。

2020年5月1日

## Thursday, 23 April 2020

### Classification of outbreak stages by variation of test count and positive rate

Introduction

2 facts about the pandemic: the first is that masks do help. The second is that testing efficiency is crucial in controlling the disease due to the distinct feature of the virus that most infected are asymptomatic. The first fact is easily measurable by measuring its effect on $R_0$. The second fact however is not.

The constant $R_0$ is largely autonomous which is independent of nation parameters and current status but hygienic condition. Testing efficiency depends on amount of (reliable) testing kits you can get, which varies a lot among countries and in different time.

In order to investigate this we would like to plot testing efficiency against positive rate because we can divide the pandemic within a country into stages.

(I was inspired by the typhoon kinetic energy vs max wind plot. That was studied in a completely different way though...)

The parameters

Horizontal axis: log(daily test count)
Vertical axis: Daily confirmed cases/daily test count

We collect data from [1] and show some plots for countries with 50+ confirmed cases for more than 15 days (with the exception for some countries whose started announcing their test count very early on).

The daily count is smoothed by taking a 7-day average instead, to average out the weekly fluctuation.

The stages

If we plot log(testing capability) against positive rate we can observe the following stages:

Stage 0 - the isolation period. No signs of uncontrolled outbreak. Testing efficiency varies due to global trends in different time.

Costa Rica: isolated case from time to time and the virus never really rooted in the nation.

Taiwan: the country that did the best really. Fully masked citizens (with sufficient and affordable masks) and proper quarantine policies. Most cases are imported and identified immediately.

Character on the plot: wandering around and affected by random events rather than the exponential trend.

Stage 1 - the outbreak period. Testing capability expands but can't keep up with the growth in suspected cases so positive rate grows as well.

Typical examples as of now: part of South America (Brazil, Mexico), Russia

The most recent outbreak occurs in Brazil but they provide no testing data so I picked Hungary and Mexico here.

Character on the plot: as the positive count grows exponentially the testing capability simply cannot keep up with the growth. That results in a raise (kind of log-linear) in both testing scale and positive rate.

Stage 2 - the peak period. The testing capability is now able to keep up with the urgent needs. It stays steadily on the graph.

Typical examples as of now: part of South America, US

Character on the plot: the testing capability expands to the point the infection rate is primarily control and peaks for a while. On the plot it wanders around for a moment.

Stage 3 - the expand detection period. The reduction in new patients allow countries to put their effort on testing less suspected cases. The amount of confirmed cases may peak as much as the previous stage but the positive rate will drop while testing count increases. The curve on the graph drops along an "isotherm" that represents a given number of daily confirmed cases.

Typical examples as of now: Europe and Southeast Asia

Character on the plot: the testing capability expands further that more asymptomatic patients are identified. The curve first slides along an "isotherm" that represents a constant number of daily positive case then drop further. (From here we can see that the positive rate is in some sense a leading indicator than the positive rate!)

Stage 4 - the elimination period. By picking out most asymptomatic patients the spreading speed of the virus is greatly reduced. Countries may reduce their testing speed slightly with positive rate also dropping to a very low rate.

New Zealand: she did a marvelous job by announcing a decisive lockdown very early with citizens closely following the rules.

South Korea: after the initial outbreak, South Korea is one of the countries that applied large scaled quick testing. Together with high-tech tracing they successfully (almost) eradicated the virus. KBO is opening soon, too!

Character on the plot: when the daily new case drops drastically the testing pressure is reduced greatly. The testing target turns to the general public, but it will not be as frequent as before.

The large countries

First let us look at the plot for large countries. As you can see from the stage 2 graph the testing scale is affected by the population but there is not a simple way to scale it down -- it depends on the wealth, technological level and governance controlibility of the nation. So for now a better way to look at that is to compare just the large countries.

Canada: Stage 1-2? Not heavily infected yet, but worries are there an outbreak may occur anytime as the right climate is arriving.

Turkey: Stage 2-3. The outbreak almost peaked and should go down soon.

US: Stage 2. Due to population distribution we can hardly say the whole country is in a similar state. New York is definitely improving but some other states are still in bad form. The overall count seemed to be stabilized anyhow.

Russia: Stage 1. That is the most interesting case. They started large scale detection early on...yet they failed to prevent an outbreak. To this there are several explanations. First the testing accuracy may not be as good as the wealthy western European nations (although the kits are mostly from China anyway...). Secondly they may not be testing the right people -- most tests are conducted in the densely populated cities, but the patients simply spread the virus from its western border which is too hard to "defend". It is rather easy to close the Russia-China border, but closing border on the west is extremely hard.

The outliers

Most countries followed this pattern, except for a few. The two main outliers are UK and Japan:

UK(aka the herd immunity): Stage 1. Yeah we now know that herd immunity is a joke and the government never really tried to implement that. However they are being dragged down by their inefficient NHS system -- they are not able to transform into a state-of-war medical system. They are also not expanding their testing capability enough. Sick people are simply asked to stay home unless their feel like they are going to suffocate. Hidden patients simple floating around the whole city and spreading virus swiftly. Although with lockdown already announced, the case count may not grow like Italy [see the stage 3 graph] -- but it is just the official number. The horribly high positive rate is sampled from seriously sick patients, hinting that the actual infected count is a lot higher. God knows when will it ends?

Japan(aka the Olympic host): Stage 1-2. They are finally willing to act a bit more after announcing the delay of the Tokyo Olympics. It is however too little too late, as the virus is already spreading independently in most large cities. Japan is also one of the few countries who is not willing to test widely, due to social pressure rather than government policy. They seemed to have controlled the spreading partially, after finally being able to shoo officers away from commuting alongside with partial lockdown and emergency state declaration. They also have better hygiene in general comparing with Europeans so the situation is apparently better -- until the uncontrollable outbreak begins.

Conclusion

So, are there anything we can tell from this plot?

- Testing more is an effective way controlling the outbreak. First on the suspects or people that had direct contact with confirmed patients, then on the sick during outbreak, and lastly on general population to eliminate.

- There aren't many countries that did not expand the testing scheme for those providing data. UK and Japan are in fact the only two -- UK is in a very bad state; Japan is worsening but they seemed to gained a little control with multiple alternate measures.

- This plot is a leading indicator comparing with the confirmed count and even more with the death count. However it gives less of a clue on when the peak period is over.

- The plot will be a stronger indicator if one manages to normalize the confirmed count by countries' capability, condition and population. In such way we can standardize and define clearly the classification of stages. The stages are still clear by identifying their shape though.

At least we feel happy that most countries are willing to test more, and adopting correct measures like lockdown, applying social distance and wearing masks, unlike what WHO claimed.

Well, that's all for me today. I hope everyone is safe during the lockdown again.

Reference:

[1] Total confirmed cases vs total tests conducted, retrieved 17 Apr 2020.

## Monday, 30 March 2020

### Calculating area enclosed by intersections

A small math question today.

Given a unit sphere and an arbitrary ellipsoid, calculate the surface area of sphere inside the ellipsoid.

Without loss of generality, we may assume the unit sphere to be centered at origin, then the question depends solely on the 6 parameters defining the ellipsoid, $c_i, \alpha_i$ for $i=1,2,3$ in $\sum (x_i-c_i)^2/\alpha _i ^2 = 1$. Without thinking too much about existence of analytic solution in terms of the parameters, we want to look for ways to calculate or at least approximate the problem.

My own solution is based on the famous Gauss-Bonnet theorem:
$\int _M KdA + \int _{\partial M} \kappa _g ds = 2\pi \chi (M)$

The curvature of a unit sphere is constantly 1, and the Euler characteristic of a disc is 1. As long as you can calculate the geodesic curvature you get
$|M| = 2\pi - \int _{\partial M} \kappa _g ds$.
The intersection is a union of finitely many closed curves we can just calculate one by one.

A simple example would be as follows:

Consider the intersection between $x^2+y^2+z^2=1$ and $(x-1)^2+y^2+z^2=1$. The intersection $\Gamma$ is given by $x = \frac{1}{2}$ and $y^2+z^2 = \frac{3}{4}$. This is a circle of radius $\frac{\sqrt{3}}{2}$ with geodesic curvature $\frac{1}{\sqrt{3}}$. Therefore we have $\int _{\Gamma} \kappa _g ds = \pi$, so $|A| = 2\pi \pm \pi$ depending on the orientation. The surface area can be verified using the formula from Archimedes $|A| = \pi (h^2+a^2)$.

*

Of course, obtaining the parametrization is sometimes too difficult. Are there any easier ways to approximate the answer? Here are two suggestions from my friends.

- Monte Carlo based: sample points on the surface of the sphere and check whether it is in the ellipsoid.

- Integral approximation: similar to Monte Carlo but instead we split the sphere into pieces using spherical coordinates, then the required area is the integral over the indicator function of the ellipsoid.

And of course we can get an estimation using the Gauss-Bonnet approach. Let us call the sphere $S$ and the ellipsoid $E$. We start from a point of intersection, say $x$. The curve goes in the direction $v\in T_xS \cap T_xE$, the intersection of the tangent spaces of the two objects at $x$. We know the intersection must be of dimension 1 because if the two objects are cotangent at the point then the intersection is a point which generates no area after all.

Obtaining this direction is simply algebra, where we find the intersection between two subspace. With this direction we can numerically obtain a closed curve. There is a gap here because we may not go back to the starting point using numerical approximation. We just assume by smoothness (well sphere and ellipsoid are very nice objects) by doing fine enough approximation things would work (actually I believe we can prove this but I am not an expert in numerical methods) -- then we have an approximated curve of intersection.

From here we can calculate its length as well as its geodesic curvature, and the estimated area follows.

Gauss-Bonnet seems quite universal even if we generalize sphere and ellipsoid to other bounded closed $C^{\infty}$ objects because they are manifolds anyway. The only worry being whether we can get a closed curve without any global features that promises convergence.

*

Well this is just a funny little problem that I enjoyed during the lockdown. I feel like I should write some maths before I go back to my creation whether it is literature, music or research.

Meanwhile I hope everyone is alright during the pandemic -- whether you call it COVID-19, or Wuhan virus. Stay indoor, and stay healthy.

## Monday, 9 March 2020

### ⑨/3/2020 Cirno's ⑨th Anniversary

YuFu - Holy Moon是自己進入太鼓界的鑰匙，做出自己最高水準似乎理所當然。

IIDX的Babylonia是自己熟識的民族風，加上自己在風雪中偶然得到靈感，做出佳作也是順理成章。

Cirno's Perfect Math Class [Wmf's Taiko]

Cirno's Perfect Maths Class: The 9th Anniversary Edition [Wmf's 2011 Taiko]

## Sunday, 16 February 2020

### On three houses (3): Cindered Shadows

DLC 4 is the last scheduled expansion of Three Houses and is also the largest expansion. A completely new side story alongside with new characters, quests and activities that provides further clues about the main story.

Having new characters and activities means you need to play side story plus a complete rundown in the main story to experience everything -- which is too much for a player who have already completed the game 5 times. Below are my thoughts after completing the side story with a taste of main story with the presence of the new contents.

Part I: on game mechanics

Side story

Did it in hard classic and it does not disappoint me. Enemies have config slightly above the "main story" hard, but with limited resources (though not "lacking resources") and being inaccessible to auxiliary battles it could be pretty hard. The way the game works here is pretty close to that in classic Fire Emblem (like Blazing Blade), so as the difficulty.

The side story consists of 6 unique battles. Enemies are compactly packed that does not allow the slightest bit of excessive training.

I personally like the third battle the most -- the two possible routes gives flexibility on how you can play the stage. Actually I figured that it is the safest to use both of them.

The final boss is also interesting given its gimmicky special attack. I found however, the fight would still be possible without the post-AOE weakening. That would be a lot more interesting as well as pushing the difficulty up to the maddening bar.

Story-wise, there is not a lot that you can do in a 7 chapter span where the second half are all about consecutive battles. Someone data-mined that there will be 13 chapters and a more detailed stories can be delivered in such length.

With the introduction of Abyss, I expect them to focus on interaction among underground students and residents because those residents are reasons the student were there. But with 7 chapters only IS did enough to introduce the students. The interactions are left for support conversations, which are also nicely written.

New classes

Yes that is a great solution to what I pointed out before. The new classes aimed to provide full flexibility between magic accessibility and melee potential of the characters.

Dark fliers is the long awaited class, fliers that can use magic. Even with sacrificed growth the class completely worth it given how overpowered fliers can be in the game.

Valkyries seem to clash with holy/dark knight at the master class, but it bridges well between the mage class and the magic knight classes since the lance requirement is gone. It's range+1 also allows long range magic snipers other than Lorenz.

Tricksters and war monks are adjustments to melee-magical units without the problem of mortal servants where growth were split 50/50 that doesn't really work on characters that fit. These two classes are primarily for melee based (trickster for dex based and war monk for vit/def based) characters who also wants to use heal at times.

Trickster is also a bridge between sword users and mortal servants, if one trains reason and faith simultaneously. However this is really a class taylor made for Yuri with his growth distribution especially with his unique combat art, the foul play. In side story I would made him MVP as he and Edelgard combined are capable to take all physical attacks. And while Edelgard slashes back for 35 damage, Yuri simply goes for 15+45 critical...

In side story, the two magical units are very fragile due to its limited movement (compared to master classes), the abundance of stairs (for valkyries) and team composition that couldn't protect them well. The war monk is kind of balanced -- he can sweep but you do not want to put him up front too often. Yuri of course survives anywhere on the map.

If we are to use these classes in the main story with proper team setup, it is expected that dark fliers will be used as a final form. Valkyrie might be a bridge to magic knight but it may also be used as a final form if one wants to do long range snips. Trickster is probably reserved for Yuri or at most Felix. War monk...is still awkward for me.

New region and activities

That I do not have full experience of. But new area's new area. They fill the area with new NPCs and new dialogues that consolidates the story further and this is never a bad thing.

Scraps may be useful for maddening or players who really lack resources. Altar is useful for New Game+ players who wants to get specific item where they didn't get because they skipped some game elements, and that's also good.

The idea of mysterious teacher is nice although I still haven't got a full picture on how it works, but it looks interesting. And for the rest, I am probably won't have the time to explore since it will take me another 15-20 hours to go through the game again...

4 new well-crafted characters and they fit well in Abyss.

Hapi the anti-social who disbeliefs the church. Constance a fallen noble with Schizophrenia. Balthus the bold, the gambler and the alcoholic. Though nothing too surprising you have got to say these settings do work.

And of course Yuri. As a house leader (kind of) he completes the weapon cycle among the leaders, and he also completes the personality quadrants among them. He is charismatic but disbeliefs in the church unlike Claude. His charm and wise fits with his trickster class, but what surrounds him does not give him free will after all. He is the classic Japanese RPG protagonist, and a fitting last piece to this Fire Emblem sequel.

I wish that the support between Yuri and Byleth(s) could have been more romantic -- Yuri can flirt Ingrid without backfiring (just look at Sylvain), but he seems to be so clueless against us...

Conclusion

So, what should I grade Fire Emblem Three Houses for now?

School system that attracts everyone except hardcore classic players. New class system that is pretty much complete upon DLC. Multiple difficulties that can be completed with or without extra battles. Up to 40 characters with thousands of support conversations.

...all in one game. This is Fire Emblem Three Houses.

I would give 7.8/10 after writing (1). But with DLC the game probably worths a score of 8.5/10. A masterpiece that is for everybody, whether you are hardcore SRPG player or not.

## Tuesday, 11 February 2020

### 夢．十夜 (X4) Encore

2019年12月30日，國際展示場。

*

28日下午、青海橋上。

「所以我的檔口就拜托你了～」
「大姐這可是三日目啊……我留在這邊一整天是要怎樣出去拼殺？」
「給我一個購物清單，我找ACGN的人幫你搶總可以吧？」
「來コミケ的重點就是要閑逛尋找自己不認識的繪師作家啊……留點時間給我總可以了吧？」看她金光閃亮的雙眼就猜到她今天另有打算。
「唔……三點我找人來代班吧。」
「三點的話大部份的攤檔都走了好嗎！一點吧？」
「兩點半。」「一點半。」
「兩點。」「嘛……兩點就兩點吧。」反正我也不是瞄準大手作品，人少點也比較方便。
「不過我有個額外條件。」「嗯？」

「我想泡溫泉。」少女轉身向著我稍稍彎腰，寬鬆的外套沿重力垂下，露出裡面的高分少女(ハイスコアガール)T恤。

「長……長野。」是旅行。

「唔……長野山田溫泉藤井莊三日兩夜如何？」網上的評分是9.5/10分，總不會是個雷吧。

「先給你六十分，剩下的要到當地再看你的表現吧。」她露出得逞的笑容：「喔對了，請cos成樹君幫我顧檔吧。」

「你是出火紋英雄相關的本，幻影異聞錄還沒登陸在那邊吧？」

「都是火紋就別分太細了啦，當是swtich版發售前應援也好。而且火紋裡適合你的男角也沒多少個吧，要不狼師(ベレト)和樹君讓你二選一好了？我覺得你跟狼師那種無口搭不上啦。」

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「嗨～讓你久等了～」依舊元氣的聲音從遠處傳來，不過似乎大家都在埋頭看本而沒有理會這聲音的主人。

「織部つばさ、17歳です！」

「的確是很可愛，跟我這套一起訂造的嗎？」

「沒有呢，這種JK服太常見了。我只是拿舊cos服循環再用一下啦。對了，你要的本本我都幫你買了喔。」她從旁邊接過紙袋，棕色的紙袋上是叼著花朵的白髮少女，旁邊寫有white parabellum的字樣，毫無疑問就是白髮教副教主凪白みと的作品。隨著教主三嶋くろね與副教主凪白みと人氣水漲船高，更多繪師也投入了量產白髮少女的行列。在新晉白髮教徒之中偏向成熟風格的ふーろ應該會成為明日之星吧。

「想買的東西都在袋裡啦，你沒看到袋子都穿了一角了嗎？」她有點吃力地把袋子舉起來。底部的確有個角破了，露出裡面滿滿的本子。不過我能斷定那個破洞是人太多把袋擦傷造成的才對。

「……唔！」她的眼神動搖了一下。

「ゆきさめ的武器娘本呢……刀彼方這次的新刊也不錯呢，他的機甲越來越有Gia的味道了。」「甚麼……！」

「偶像大師那邊有看過嗎？雖然你對R18本沒興趣，不過聽說白瀨終於有正常向本子了……」

「現在不是還有一點時間嘛～我帶你極速走一圈好了。上面所有提過攤位的位置，我都記住了喔。」

「真……真的？」現在的她完全失去平常的氣勢，像兔子般眼巴巴的望著我。

「你看我有騙過你嗎？」我從自己攤位的後方抽出一把長傘：「要看的話現在就要趕快去囉，再晚一點就真的甚麼都沒有了。」傘柄被修改成劍柄的樣子，看上去就像把佩劍抽出來一樣。長傘旁邊才真是蒼井樹的劍，不過遊戲裡劍都是憑空抽出來的，我身上根本沒有掛劍的地方，劍便只好這樣放一邊了。

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## Thursday, 23 January 2020

### 拉麵食記2020：拉博、燈花、Due Italian

Ryu's noodle bar

800圓的清湯鯛鹽拉麵質素遠超我的想象。清澈的湯底可以嚐出鯛魚的鮮味，隱晦的魚湯唯有鹽味才有辦法配合。正因為湯底極淡，每一種配料的味道都清晰的呈現了出來。半肥瘦的叉燒沒有太多醃製但單純的油脂味與湯底相當配合；超長的新鮮竹荀除了口感一流外亦為清湯增添鮮味；柚子配鹽味湯底算常見組合，雖然偏苦但配上清湯反而效果不錯；糖心蛋偏熟是唯一扣分的地方。平時很少將湯喝完的我居然也把湯喝光了，足見鯛鹽湯底之清。

Due Italian

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