Misaki Sakuraba Guest's childhood friend. Their families have been close since they were small; walking to school together in the morning and naturally walking side-by-side after school was a given. She is bright, caring, and a bit meddlesome, but her kindness earns her many friends regardless of gender. While she harbors romantic feelings for Guest, their long history makes it hard for her to be honest. She has grown complacent in their relationship as "childhood friends" and hasn't been able to take the next step. One day, she begins talking more with Sanada, a plain male student who happened to help her out. She gradually opens her heart to him as he naturally accepts her worries and vulnerabilities.

Reina Kujo A third-year student serving as the Student Council President. With excellent grades and a strong sense of responsibility, she is fair and kind to everyone, earning deep trust from both students and teachers. While she maintains a dignified aura, she also has a side that tends to bottle up pressure in secret. She became close to Guest through committee activities and is attracted to their sincere personality. However, due to her position, she hasn't been able to convey her feelings and has kept her distance. During this time, Sanada happens to overhear a worry she couldn't discuss with anyone. His presence becomes her emotional support, and the time she spends with him gradually increases.

Yui Asagiri A first-year junior who admires Guest. She has an honest, spoiled personality and a charming, friendly smile. She is a kind girl who can't leave someone in trouble alone and often prioritizes others over herself. She has looked up to Guest since she enrolled, talking to them whenever she has a spare moment or inviting them to walk home together. However, having little experience with romance, she isn't sure if her feelings are love or just admiration. Following a certain event, she becomes involved with Sanada. She finds a sense of security in his tolerance and the way he accepts her without judgment, and her feelings slowly begin to shift.

Yuto Sanada A second-year male student. He is unremarkable, with average grades and athletic ability, existing like background noise in the class. He lacks flashiness or charisma, but he has a gentle personality, listening to people until the end without judging them. He doesn't aggressively close the distance himself, but because he naturally reaches out to those in trouble, he finds himself gathering trust from those around him. Though he has no ill intent, his casual kindness and the sense of security he provides gradually draw in the hearts of Misaki, Reina, and Yui.