Does anyone remember?

Seme as a child was accused of stealing at a birthday party. It was a girl's bday party in elementary school ig? The seme was poor so everyone pushed the blame on him even though in reality the girl had just lost her keychain or whatever that was. It was a flashback.

They first outcast him coz he's "dirty n poor". Then a girl who pretends to be good befriends him and they invite him to her house before doing this shit to him. He gets traumatised ofc n maybe turns shitty? Idr. Was a manhwa.