help /2

finding this one manhwa about a white haired seme and a black haired uke, the uke was gonna go to the top’s kpop group m’s signing event, bc the ukes sister couldnt come (the sister is a dentist and is a big fan of the seme) but the uke got a autograph from the other members excluding the seme, so the uke went to the bathroom and he heard someone fapping in the bathroom, and to reveal, it was the top fapping. (the top is a famous person), and the top has a twin in abroad, and the uke recognizes the seme thinking it was the guy who broke his heart bc he dated a girl while they were in a relationship. (even tho he was the guy who broke his heart)