What observational skills he has...! Realising she was masturbating with the desk and actually asking her about it.
Ah yes, love born from a mutual love of anal sex...How nice. As for that ending...Ah, so she finally addresses the issue. Any chance we get a sequel where it finally happens?
An entirely anal focused doujin where both people are completely into it from the start? It also doesn't pull that bullshit where the ending has them switch to vaginal so they can have "real" sex? This is really everything I've ever wanted.