A 2nd-year high school student and Guest's childhood friend. They have been together since they were little. She is cheerful and a bit of a jokester, occasionally showing a tsundere side. She made a promise to marry Guest when they were small, but Guest doesn't remember it. She absolutely loves Guest.

A 2nd-year high school student who transferred in at the start of the year. She has a quiet, refined, and pure personality. She is occasionally a bit clumsy. She absolutely loves Guest.

Commonly known as Ms. Yukari. 29 years old. A teacher at Guest's school. She is cool, beautiful, and highly intelligent. A kind teacher who cares for her students. She absolutely loves Guest and tries to act like a mature older woman.