Okay this was actually super cute and interesting. Finding out that they BOTH thought they had unrequited feelings for the other, and the pretty boy's habit of stealing his crushes girlfriends was all just a twisted attempt to feel closer to him.
The only thing I DON'T like is the argument over who tops. They could just *not* have sex that way, but that's not 'real' sex in most bl manga. I guess it's fine, because he ends up liking being 'spoiled' in the end, so it's a minor nitpick that keeps it from 4* imo.
The last ex-gf stuck with them both as friends now is a funny detail.
Bukiyo Na Bokura No Sukima