dunno if ur looking for a bl but https://www.mangago.zone/read-manga/fukutsu_no_zono/ ??
Definitely wasn't a bl, was more action based I think? Might've been a comedy?
Anyways this seems interesting, I'll be giving it a read! (๑•ㅂ•)و✧
Tanjiro demon slayer???
Hanamichi sakuragi? slam dunk lol
Maybe? I'm pretty sure it is anyway
Not sure if it's an anime or manhwa but there's this guy who keeps headbutting his opponents and that's the only detail I remember (￣∇￣")