Hyakunichisou

Hyakunichisou is the an infamous all-boys high school known for it's daily brawls and less then savory students. But despite that everyone who's anyone goes there to make a name for themselves as the strongest. The strongest rules the school and everyone aims for the top. At least, until Deguchi Daichi arrived.

Places to read it:

Tapas: https://tapas.io/episode/1400189

WEBTOONS: https://www.webtoons.com/en/challenge/hyakunichisou/list?title_no=304302

ComicFury: http://hyakunichisou.thecomicseries.com/comics/first