Ushinawareta Mirai wo Motomete

Sou Akiyama and his friends in the astronomy club are preparing for their school festival when Kaori, his childhood friend, is struck by a tragedy. Yet the days seem to begin again, and a mysterious girl named Yui appears among them.

Yui's arrival changes the course of familiar conversations and choices. While the club investigates strange happenings around the school, friendship and unspoken love become entangled with a future that refuses to stay fixed. Saving Kaori means confronting the connection between the new girl and the days that have already been lost.