In a town blanketed by snow, a place from his distant childhood, Yuichi reconnects with his cousin Nayuki. As she gives him a tour of his new home, he struggles with memories long faded.

After his first day at school, Yuichi is able to stir the memories of Ayu, who happily recalls a promise he made to her years before. But the strange girl who later attacks Yuichi doesn’t seem happy at all.

Yuichi’s attacker claims to have amnesia, and with the gaps in his own recollections and Ayu’s forgetfulness, Yuichi starts to think the town might somehow alter people’s memories.

Ayu still can’t locate what she’s looking for, but Yuichi knows where he left Nayuki’s notes: at the school. When he goes retrieve them, he finds he’s not alone in the hallways - and the other person is armed.

Mai explains why she’s at the school with a sword. The next day, Yuichi sees her almost use it on Makoto! When the incident ends, Mai offers Yuichi a bit of odd advice on how to handle the amnesiac.

Makoto has an appointment to interview for a job at a café. Meanwhile, another encounter with Shiori makes Yuichi late for his movie date with Ayu.