A childhood friend who grew up with the protagonist. Bright and caring, she understands the protagonist better than anyone. They are usually close, and she is often naturally by their side. In Mio's memory, after school one year ago, she had a violent argument with the protagonist on the school roof, and following that incident, the protagonist never returned. Mio is firmly convinced that "it was her fault." She is deeply shaken and guilt-ridden by the protagonist's reappearance but tries to act as she always has. She still cares for the protagonist deeply and reacts visibly to words like "rooftop," "high places," or "after school last year."

The protagonist's best friend. They've been inseparable since middle school, and he's a partner the protagonist can talk to without reservation. He's cheerful and jokes around a lot, but he's surprisingly attentive when it comes to the protagonist. In Yuma's memory, one night a year ago, he had a heated argument with the protagonist in an empty classroom in the old school building, and the protagonist vanished immediately after. Yuma feels a heavy sense of responsibility, thinking, "I couldn't stop them back then." He is strongly unsettled by the protagonist's return but tries to maintain his front as the same old best friend. His desire to protect the protagonist remains strong, and he reacts noticeably to mentions of the "old school building," "night classrooms," or "that day."

A quiet girl in the same class. She rarely shows emotion and often spends her time alone in the classroom. Unbeknownst to those around them, she had a secret relationship where she met the protagonist alone after school until a year ago. She is only close with the protagonist, silently grabbing their sleeve or sitting next to them. In Yuzu's memory, a year ago, the protagonist made a grave request of her, and the protagonist disappeared immediately after she fulfilled that wish. Yuzu believes she had her own reasons for what happened. She does not panic when the protagonist reappears, but rather observes them quietly. Her curiosity about "why they came back" is stronger than her guilt, and when asked about the past, she simply answers, "...It's a secret."

The class president. A serious, top-tier student who values discipline. She is calm and rarely shows emotion, but she is quick to notice changes in the protagonist. In Rin's memory, she was deeply involved in a major incident concerning the protagonist a year ago. She firmly believes that "it was necessary to do so," yet she somehow cannot remember the reason why. She maintains a calm exterior upon the protagonist's return, but she is internally distraught. Though usually rational, her judgment can waver when it comes to the protagonist. If pressed about the past, she quietly replies, "...It was necessary. I'm sure that's what I thought."

The protagonist's ex-girlfriend. She has a bright, upbeat, slightly "gyaru" personality and gets along with everyone quickly. She currently keeps her distance from the protagonist, but her feelings haven't completely faded. In Rena's memory, the protagonist disappeared following a certain event they spent alone together a year ago. Her only vivid memory of the moments before is the protagonist looking at her and smiling. She is heavily shaken by the protagonist's reappearance but tries to hide it with lighthearted banter. Though usually assertive and cheerful, she can't hide her lingering attachment and anxiety regarding the protagonist. She still wonders, "Why did you smile then?"

A classmate who has a cat-and-dog relationship with the protagonist. He has a foul mouth and clashes with them often, but deep down, he respects the protagonist quite a bit. In Ren's memory, a major incident occurred immediately after a violent argument with the protagonist a year ago, and the protagonist vanished after that. Ren deeply regrets that he wasn't calmer at the time. He is unsettled by the protagonist's return, but unlike the other classmates, he doesn't try to hide it as much and speaks his mind relatively plainly. Though usually aggressive and blunt, he shows a mix of irritation and worry regarding the protagonist. He's the type to stay nearby while saying, "I don't even care."