Medaka Box - Fukukaichou no Asai Jijou (Doujinshi)

[MangaDex]

 

[KazuyaKan]

Talk about a blast from the past. This one came out shortly after the manga originally started, before it saw it's popularity fall and then went all battle manga. That was the big thing back then, if the manga was failing and everything the author/artist tried to improve failed so far, go battle manga.