In the snowy mountains of Hokkaido, Yusuke has a grand proposal prepared for his girlfriend Saeko — but their journey takes an unexpected turn.

Thanks to a successful heart transplant, Naruse gains a new lease on life and surprising new habits. Later, a train delay leads to a fateful meeting.

Saeko can't help but see Yusuke in Naruse, especially when his words eerily echo her late fiancé's. Naruse experiences a terrifying flashback.