Responses
(Warning: some may contain dark themes/images)
Clover (tetsuhiro Hirakawa)
Crows
Lookism
Kiichi!! (gets more delinquent-y later on and in the sequel, but is still a fantastic read)
Jojo's Bizarre Adventure (there's an anime series as well, dives more into delinquent/gang type stuff later on in parts 4-6)
Slam Dunk
Worst
Out (Makoto Mizuta)
Kyou Kara Ore Wa!! (this one also has an anime)
Any manhwa/manga recommendations like school delinquents, bully [Tokyo revenger, windbreaker, weak hero, any ptj manhwa ], or even assassination [assassination classroom, sakamoto days, teenage mercenary]
Like at 100 chapters or finishes one would be nice cause I'm reading 4 different manhwa/manga and I'm not enjoying them