LOLITA.FR asked a question

Hi I'm looking for the name of this manga:
A girl lives at her mom's house, there's like this older guy living with them. I think at first he's the mom's boyfriend, but then after an argument (bc he was taking pictures of the girl) the mom storms off and dies in a car accident. After that, the girl and the older guy live together, become this kind of sexual couple (toxic). I can remember that the girl is a dancer, in Carmen and (spoiler!) her dance teacher is a murderer who writes books.

I'm not sure to like it again by reading it but I just want to find it again.

If someone could please help me find it I'm starting to wonder if I didn't imagine it thank you very much have a great day :)