Opinions may differ as to whether boyfriend-kun made the "marriage promise" angle sincerely, or merely played with the idea to (a-hem) "open the back door" (so-to-speak).
Huh...When you say deplorable request, you make me think of...a different type of request.
Anal though? seems quite normal to me, especially by Hentai standards.
Great ending though. Yeah...When you say something so adorable to your man, you can't expect him to not...immediately jump you and go for another round, yes?
Also after they get married, I'm sure there'll be a lot of cumming inside so that's fine...Though it certainly would be nice to be able to see.