Infinite NTR Bad Endings - Cuckolded over and over again, regretful and mad each time

During summer vacation, the protagonist Harukaze Tsukushi suddenly runs away from home and moves into the apartment where her older cousin Kazuki lives.
However, in the room next door to Kazuki lives Hina-tan, an evil and erotic goddess who loves Tsukushi, and she seems to be plotting some evil deed...

This is a summer story about Tsukushi, a devotee of a more cruddy nerd, and Hina-tan, a goddess who wants to see Tsukushi fuck a playboy's cock!!!