The comment section is once again flooded with complaints about this manga being 'horrible, sick and gross' merely because it has rape in it, when that's not the point of the story. To all similar complaints, I'll have you know that there's nothing wrong for a story to contain rape. Movies contain rape scenes as well - it is just an aspect of the story. It's not as if the manga is promoting sexual abuse. It's simply something that happened between two characters - a conflict. The manga doesn't say that rape is good either, so I don't see what there is to complain about. It was a good manga.
Sono Kuchibiru ni Yoru no Tsuyu