From what I understand, Tsukuyomi has always been a weird girl. In her previous school, she was constantly bullied by Kazuki to the point of having her skull half smashed in by him resulting in a long time hospitalization. However, she doesn't seem to mind all that, at all. She takes his bullying as a compliment that he notices her and is willing to "interact" with her. And she has such devotion to Kazuki that she is willing to forgive nearly everything he does, except for that bad end. My question is, where did that devotion originate from? Stockholm Syndrome for bully victims?

I get the first part of Kotone's story alright, the doujin part where she sold nothing and came back empty-handed. The second part, with her family is the sudden part. So the two of them are talking.... then suddenly it is revealed that she is nearly raped by her father when she was young. The fallout I understand with her somehow feeling responsible for what happened. But perhaps some more clues or lead-ins leading up to the revelation?