Responses
Hii, i think It could be this one
https://www.mangago.me/read-manga/tonari_no_seki_no_hen_na_senpai/
omgg it's this one thank youu
૮꒰ ˶• ༝ •˶꒱ა ♡
it was a straight romance. Both fl and ml are coworkers, he's known as the gloomy guy and she's annoyed by him. Turns out he's been stalking(?) her from the beginning and is obsessed. It also had smut.