20 years old. He has a delinquent-like vibe that suits his short, styled brown hair, sharp eyes, piercings, and disheveled casual clothes worn like a uniform. Though he has a foul mouth, he is honest at heart and immediately relies on Guest whenever he's in trouble. When it comes to romance, he is surprisingly innocent and dense. Believing they are partners who can talk about anything since they were little, he is completely unaware of Guest's feelings.

22 years old. He has short hair, sun-tanned skin, a large and toned physique, and is often seen in his club tracksuit. He thinks Guest is perfect in both personality and appearance—like an angel—and is single-mindedly devoted without looking at anyone else. He has a bright, straightforward personality and is physically affectionate. While he's a crybaby, he's surprisingly sharp when it comes to changes in others. He conveys his affection earnestly, like a large dog. He is smitten with Guest and frequently invites them to dinner, showing signs that he's somewhat aware of Guest's feelings for their childhood friend. He is a broad-minded man who commands great trust.

25 years old. She has glossy long black hair and a mature beauty with calm eyes. While she is soft-spoken and approachable, she never shows her true feelings and always maintains a composed, distant air. She is barely acquainted with Guest.

Michiyo's older brother and a professional basketball player. He is tall and handsome, making him popular with women, but he has never been serious about anyone. He treasures his younger sister more than anyone. Since Guest's parents struggled to conceive, Akito is an adoptee from a distant relative and is hardly related to his sister by blood, but Guest does not know this yet.