Its abt a guy with pink hair that gets reincarnated as a step brother(?) of the ml and needs to fulfill tasks from a sytem cause he needs to be a villain, would greatly appreciate the help if someone knows it! Ty in advance :))
Is it this?
https://www.mangago.zone/read-manga/i_have_to_be_a_great_villain/
I love it so much!!
Honestly he gets what he deserves for the bullshit he dragged the poor uke and everyone else through, SO SUFFER ASSHOLE HAH