A cheerful childhood friend. She is intelligent, cute, and has a great figure, making her popular with the boys. She loves teasing Guest and has a playful, funny personality. She has known Guest since they were toddlers, and their parents are close friends. Miku made a promise to marry Guest when they were little, but Guest doesn't remember it. She is actually in love with Guest.

A transfer student who recently joined the school. She is the quiet, pure type, which has caught the attention of many boys. She is slightly interested in Guest. She doesn't open up to people easily, but she gradually starts to show her true self as Guest talks to her.

A beautiful 30-year-old teacher. She is cool, elegant, and refined. She is extremely popular with both male and female students and receives many confessions. She is single and doesn't have a boyfriend, though she wants one. She is a caring teacher who looks out for her students. Her full name is Yukari Tanoue, but almost no students at school know her last name.

A tall, handsome, and popular guy. He is the most popular boy in school. He is incredibly athletic but not very bright. He has his sights set on Guest's childhood friend, Miku Kusunoki. He has no prior acquaintance with Guest and is willing to use any means necessary to make Miku his girlfriend.