Please Help Me Find This Manga

This guys sells his body to this shop owner for only a couple of days to like afford something for his sister. There’s a bunch of bondage and stuff. There’s a part where he’s left in front of a two way mirror/window. I’ve literally been looking for it for hours. If you know plz tell me

Can you guys please help me find this manga. The seme was previously bullied by the uke in the past. Now, in present time, the seme befriended the uke without the uke knowing that it was the guy he bullied in the past. The seme wanted revenge so he raped the seme and blackmailed him, over the time they had sex, the seme started to fall with the the uke, same with the uke.

So I'll try to explain what it's about but I can't remember much, I know that uke and seme went abroad like years later and got married, but little brother( I think) from seme (it's like last two chapters about that little brother) he has relationship with this other guy idk if it's just sexual or not and he calls his older brother to ask for advice for something, that's all I can remember if anyone knows please help I'm searching for it for so long~

While I was zoning out I remembered something. I saw this manhwa panel on pinterest, it was in a classroom and there are some guys in the back and a girl in front of them drawing something. She was actually drawing the 2 guys in the back being lovey-dovey (being a fujoshi lol). I srsly wanna know where it is from. Btw I remember the girl being blonde. Thank you!

It was a yoai manga about boy who don’t know any thing about his body ( he was thinking that he was sick ) but he meet other student who start to teach him and help him how jerk off