Udauda Yatteru Hima wa Nee!

Overview

Shimada Aki and Akaki Naomi are best friends since their childhood. Shimada is tricky and won't be serious with anything that's not fun or profitable to him unless provoked; Akaki, on the contrary, is straightforward, more caring and dull. However both are talented at fighting (bullying). This manga is a comedic and fun story of the careless high school buddy's accidental fights that makes them known to all Japan's scary and influencial gangsters.

Source: AniList