specific yaoi ft fakeout love triangle

i can't remember the title or character names, but i'm looking for a specific yaoi that the main character is a woman in either late high school or private college that thinks the gloomy delinquent and the class president are fighting over her but it turns out that they're both in a relationship and she walks in on them fucking. i don't remember anything else. i don't think i read it on here. lmk g