Rin raised Masaaki single-handedly, and he went on to university and became an adult. - I felt like I had finished raising my children. - At that time, I met a man through work. - It was a man named Okawa who lived in Tochigi. - Despite the age difference, Rin was attracted to Okawa, who was sincere and kind. - Despite the long distance, the two met many times. - Rin, who has begun to think about remarrying Okawa, invites Masaaki to go on a hot spring trip and heads deep into the mountains of Tochigi. - On that trip, Rin comes to know about Masaaki's feelings...