If you want to start manga after watching season 1 of anime, start with chapter 73
Todai Revengers
Description
Toudai Revengers or The University of Tokyo Revengers (東大リベンジャーズ, Tōdai Ribenjāzu?) is the official parody gag manga of Tokyo Revengers (Manga). It is created and illustrated by Shinpei Funatsu.