Light spoilers. “Best chapter” is not an official label. This guide separates emotional impact, character development, comedy, and reader reaction. Numbers, titles, and dates were checked primarily against official sources as of October 7, 2026.
0. Bottom line
If you only read one chapter, pick Chapter 27, “こまろの世界.” The series usually runs on dirty jokes and bizarre student-council comedy, then suddenly centers Komaro’s loneliness and sense of belonging. Reader reviews repeatedly single it out as a chapter that gives the manga more depth.[1][2][3]
If you want maximum chaos instead, go to Chapter 85 “からだの不思議！” and the titles containing “ックス.” Official web sources currently confirm three main-story chapters: 117 “雨宿りックス!!,” 186 “電車ックス!!,” and 187 “こたつックス.”[4][5][6][7]
1. “Best” depends on the category
This manga can win through emotion, payoff, four-panel timing, or a title that already feels like an editorial incident. So it makes more sense to separate emotional standouts, development payoffs, comedy standouts, and “how did this title get approved?” chapters.
2. Emotional pick: Chapter 27
Published November 16, 2022.[1] Its strength is contrast: after training the reader to expect another punch line, the manga makes Komaro’s isolation visible. The serious tone does not feel like a different series; it adds history to the character and makes later comedy land differently.[2][3]
3. Komaro’s arc: 39 and 155
Chapter 39 “こまろの前進” was published March 1, 2023 and is often treated as a payoff to the longer onigiri thread.[8][9] Chapter 155 “こまろの世界Ⅲ” arrived December 3, 2025 and drew a large amount of supportive discussion on the official page.[10]
Reading 27→39→155 turns Komaro from a set of traits into a character with a visible history.
4. Comedy pick: Chapter 85
Chapter 85 “からだの不思議！” was published March 19, 2024 and is built around a public-bath outing. A long-form fan review explicitly calls it a “god-tier” chapter.[4]
It works because cast chemistry, physical comedy, rapid dialogue, and small character beats all run at once. Chapter 27 says these characters have inner lives; Chapter 85 says, “Correct. Now let’s be ridiculous again.”
5. Which chapters are the “ックス” chapters?
| Chapter | Official title | Magazine Pocket date |
|---|---|---|
| 117 | 雨宿りックス!! | 2024-12-25 |
| 186 | 電車ックス!! | 2026-09-30 |
| 187 | こたつックス | 2026-10-07 |
117 is confirmed on its official page, 186 in the official episode list, and 187 in the official Weekly Shonen Magazine 45/2026 lineup.[5][6][7] Comic DAYS lists 117 on March 17, 2025 because that platform received it later.[11]
6. Chapter 117: the earliest confirmed entry
Among the three confirmed titles, 117 is the earliest. A normal title could have stopped at “sheltering from the rain.” It did not. The chapter also follows relationship development, so it works better in sequence than as a random gag.[5][12]
7. 186→187: two consecutive weeks
Chapter 186 appeared September 30, 2026; Chapter 187 followed October 7.[6][7] After a long gap from 117, the naming pattern returned and immediately stayed for another week.
One reader reaction described 186 as shockingly good.[13] That is anecdotal, not an objective ranking. Chapter 187 is brand-new on the date of this article.
8. Fast reading routes
- One chapter: 27
- Komaro arc: 27→39→155
- Maximum comedy: 85→117→186→187
- All confirmed “ックス”: 117→186→187
Read only the serious chapters and the manga looks unexpectedly warm. Read only the chaos chapters and it looks like the editorial brakes disappeared. Both impressions are correct.
9. Final answer
Best all-around emotional pick: 27. Development: 39 and 155. Comedy: 85. Confirmed “ックス” chapters: 117→186→187. Latest: Chapter 187 on October 7, 2026.
“Best” is subjective. Whether the title contains “ックス” is auditable. The confirmed count is three.
References (13)
- マガポケ公式「第27話 こまろの世界」 pocket.shonenmagazine.com
- とんかち「陸奥こまろ勝手にカワイイランキング」 note.com
- honto「生徒会にも穴はある！（2）」読者レビュー honto.jp
- 山田「『生徒会にも穴はある！』85話『からだの不思議！』」 yamakamu.net
- マガポケ公式「第117話 雨宿りックス!!」 pocket.shonenmagazine.com
- マガポケ公式エピソード一覧（第186話「電車ックス!!」） s.magazinepocket.com
- マガポケ「週刊少年マガジン 2026年45号」公式一覧 pocket.shonenmagazine.com
- マガポケ公式「第39話 こまろの前進」 pocket.shonenmagazine.com
- ひつじのクセつよアニメ漫画研究会「こまろちゃんがかわいい！…」 kusetsuyo-animecomic.com
- マガポケ公式「第155話 こまろの世界Ⅲ」 pocket.shonenmagazine.com
- コミックDAYS「第117話 雨宿りックス！！」 comic-days.com
- Web漫画アンテナ「生徒会にも穴はある！ 各話あらすじ」 wiki.webcomics.jp
- 第186話公開直後の読者反応の一例 twstalker.com
