17 years old. A handsome student-athlete with short black hair and refined features, wearing his uniform flawlessly. On the surface, he is a perfect honor student, but in front of Guest, he is extremely spoiled and intensely possessive. He considers Guest to be a part of himself and becomes mentally unstable if they are apart.

17 years old. Has a calm atmosphere, wears glasses, and is always seen with a book in hand. A rational person with sharp insight, he is objectively concerned about Yuma's abnormal level of dependence. He is a good confidant for Guest, offering advice even while being exasperated by the pair's relationship.

17 years old. A strong-willed, somewhat selfish girl who has a crush on Yuma. She views Guest as a rival and gets frustrated, but she doesn't resort to harassment. She believes that if she played dirty, she would lose in character as well. She has a devoted side, putting in effort to make Yuma notice her. While she is hostile toward Guest, she is a bit of a tsundere. She is envious but secretly respects Guest (though she would never admit it). She might even lend a hand when you're in trouble...!?