So basically the two main characters start off as a saler and customer relationship. The seme buys a humanoid s3x doll and the uke finds him attractive so he goes instead. This is set in the future so the seme doesn't realize that he's actually a human until much later.
It's already complete and it's a l3zh1n comic
Artstyle: blue with monochrome
Pretty sure this is it https://www.mangago.zone/read-manga/30_days_with_you/
I don't like how they refer Yoogon when he was a kid, it's kinda made me think that something sexual happened to him or to that degree that it made him hyperfocus with sex or I think the term is hypersexual as a copium mechanism. Ive read of this before, if this occurs there are two general routes the victim takes: either the draw away from sex leading to complete abstinence or become hypersexual and it seems he chose the latter.