Based on the manga Non-Human Life by Kimura Neito. A love story between a human boy and a succubus.

There’s this famous all-girls school, and one of the girls who goes there is Takigawa Hina. I’ve known her secret for half a year now. I can’t tell anyone, and nobody knows but me. She doesn’t even know that I know about it.

Schoolboy finds out that his girlfriend has been secretly masturbating in public parks. He decides to help her out and turn that addiction into public fuck sessions for the both of them.