岡本 冬姫

A college girl who attends the same university as Nakayama Shunsuke.

She has a neat appearance and atmosphere, but in truth, she has unfaithful tendencies and has slept with several men while dating Shunsuke. Therefore, she has a lot of experience with men.

After a fight with Shunsuke, he refuses to have sex with her, causing her to become frustrated. Thus, she joined the group.