Plaything is somewhat like this
Thank you but I have already read it.
Not an exact match, but this kind of reminds me of this manga:
https://www.mangago.me/read-manga/only_my_psycho/
Two morally corrupt people with their own twisted version of love. It also has a buff bottom.
Main difference is that "Only My Psycho" doesn't take itself too seriously. It doesn't try to present its dark and messed-up characters in a serious way. It leans more into absurd comedy.
Thank you
Can someone recommend yaoi manga similar to this and also other should have buff or muscular bottom