I think it was a shoujo(?) manga (not sure tho but its definitely have romance genre) set in highschool
so the fl is kinda casually sleeps around and i remember them (fl and ml) having sex in the rooftop in the early chapter (1 or 2) and theres this female character that has a innocent facade (short hair i believe) on but the fl see through it bcs she realizes theyre the same kind of person, i dont remember much abt the ml tho ( ̄∇ ̄")
i read this a long time ago (2016/2017) and i dont think i finished it so this just popped into my mind now i cant sleep ╥﹏╥ pls help me