国府津 友莉

One of the two heroines in the second title of the series. She is a third year student and is the Student Council President who takes her position very seriously. She is also close friends with Marin.

From the start, the prudish Yuuri was against the arrival of the protagonist in the all-female countryside where the school is located. Has had a pure and noble look all her life. Despite what she says, Yuuri is afraid of what other people might think about her... because she secretly loves to masturbate! She's afraid that someone will find out her secret. Like all succubi, the strait-laced Yuuri possesses an amazingly sexy body.

Due to a certain reason, she eventually decides to participate in a naughty lesson with the protagonist.