i think this one (?) https://www.mangago.zone/read-manga/tsurenai_kanojo_no_hitorijime/
if its dat one, just wanna clarify FL did not do the deed w the previous boy, they just kiss and grope, her first exp still w ML (this part makes me mad bc ML is such a player have tons of exp and author just make FL like "shes naughty but not really cuz shes still super pure for ML" JUST PISSED ME OFF LIKE GIVE THIS GIRL THE EXP SHE DESERVED AND ML HAD AUDACITY TO GET MAD ABT HER LIL BIT EXPERIENCE WHILE HES A MANWHORE is just baffling.
sorry for the yapp :( everytime i remember ML sulking abt it annoyed me lmao.
SORRYYYY i just kind of read it off on tiktok and couldn't find it anymore
it's a straight romance. The girl have black hair and the boy is blonde i think. they are in highschool. the girl invited the boy to her house for some reason and they did the deed. that's how their relationship started. the boy found out that he's not the only one, she also did it with another boy on a library, he's hurt because he thought he's special. the girl is like a nerdy type and the boy is like the popular guy. the girl always reads books because her father is a writer and she's always alone at her house.