Searching for this desperately

They’re both yaoi. One is manga and one is manhwa.
YAOI MANGA:

Details; Uke is high school student. So basically the uke has a boyfriend I believe, he needs a part time job and the uke finds one. He arrives at a room and finds it suspicious but decides to do it anywyas, he finds out what the job is (sexual) and does it anyways.

The older man fucks him. And then he tells uke to invite some of his classmates. And when the classmates arrive, the uke gets fucked by them too and his boyfriend also witnesses it. The boyfriend is upset but then he also fucks him and watched uke being fucked.

YAOI MANHWA:
Ahn Jueon or something was the title. I forgot.

Details; Uke has black short hair and blue(?) eyes. He signed something and he has to do sex work. The blondie fucked uke after uke had signed. The one who made contract is blonde male lead, and the ML is blonde’s little brother, he has brown hair.

Uke and brown hair ML met in school I believe. The ML didn’t know uke was doing sex work. The uke gets gangbanged by clients. The blondie ML walks into the sex work room and sees Uke bounded up in the air with red ropes, his legs apart, the clients had already used him. And the blondie forced his way inside Uke.

The uke cums easily too. And the brown hair ML found out soon when he was invited to the sex work place by blondie, but he didn’t expect to see the uke being gangbanged by other clients. Brown hair was shocked and left.

I think uke stopped the sex work and dated brown hair.