Yuichi Aizawa comes to stay at his cousin’s home in northern Japan after seven years. He meets Ayu Tsukimiya in the shopping district, who pulls him into running away from a taiyaki vendor with her.

After his second day of classes, Makoto Sawatari tracks Yuichi down in the shopping district, trying to pick a fight. She collapses from hunger, however, and Akiko takes her in. The next day, after discovering some of her pranks, Yuichi suspects her of stealing his wallet.

Mai resolves to end the fighting once and for all. As Mai and Yuichi fight the monsters together, Yuichi traces another fragment of his lost memory.

It is now spring, and Mai and Sayuri have graduated. Although Akiko is on the road to recovery, a rift still remains between Nayuki and Yuichi. On the day Yuichi is scheduled to leave and transfer to another school, Nayuki sees a familiar name tag at the hospital.