These are one-shot manga anthologies featuring Josou Shounen (Cross-dressing Boys). There have been 17 volumes published to date. Each volume carries a subtitle. They are:
1. White Group (Shiro-gumi)
2. Peach Group (Momo-gumi)
3. Princess Group (Hime-gumi)
4. Blue Group (Ao-gumi)
5. Red Group (Aka-gumi)
6. Cherry Blossom Group (Sakura-gumi)
7. Plum Group (Sumomo-gumi)
8. Melon Group (Melon-gumi)
9. Apple Group (Ringo-gumi)
10. Satsuma Group (Mikan-gumi)
11. Grape Group (Budou-gumi)
12. Banana Group (Banana-gumi)
13. Plum Group (Plum-gumi)
14. Watermelon Group (Suika-gumi)
15. Ribbon Group (Ribon-gumi)
16. Princess Strawberry Group (Hime Ichigo-gumi)
17. Princess Apple Group (Hime Ringo-gumi)
Summary of each oneshot [here](https://justpaste.it/nemu). [Note: Incomplete i.e. contains only a subset of the total]
Hirokazu Kohama suddenly discovers one day at school that his schoolmate Tsubasa Yamashita who everyone at school thinks is a girl is actually a boy. Tsubasa soon realizes that the best way to make sure that Hirokazu doesn't tell anyone his secret is to get him to fall in love with him.
Nogami Kasumi, a young high school girl, moves in with her unrequited love, who turns out to be a bit…
Comedic one-shot following an infatuated girl and a guy who's a bit… peculiar.
Made in Abyss: Official Anthology is a compendium of short comics set in the same world and with the same characters from Made in Abyss.
It's a parallel series from the same publisher, Takeshobo, and with Akihito Tsukushi's blessing, that gathers the work of multiple guest professional artists to tell non-canon stories, with some of them being serious, while others are totally silly or humorous.
It has been published on Webcomic Gamma, alongside with Made in Abyss, since 2017.