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.

As Saeko and Naruse come to terms with who the heart donor might have been, Naruse tries to learn more about Yusuke as a person.

Before the accident, Saeko and Yusuke briefly encounter Naruse on a rainy day. In the present, Saeko and Naruse take a day trip down memory lane.

Naruse receives a sudden diagnosis from his doctor. Meanwhile, Saeko musters the strength to make a bold decision and has an honest conversation with him.

While Saeko gets accustomed to her peaceful life at the coffee farm in Hawaii, Naruse comes to terms with his own life and makes an important decision.