Yayoi Yuki and Taro Yamada graduate from high school and go on to pursue their own paths. Yayoi becomes a successful artist, while Taro becomes a dedicated teacher. They both start their own families, but their feelings for each other never truly fade.
As the years go by, they continue to stay in touch, meeting up for occasional lunches or phone calls. They support each other through the ups and downs of life, offering words of comfort and encouragement when needed.
Yayoi goes through a divorce, while Taro loses his wife to illness. Through it all, they find solace in each other's company, understanding each other in a way that no one else can.
When a natural disaster strikes their town, they both experience loss and heartache. Yayoi's home is destroyed, and Taro's daughter is injured. In the midst of chaos and tragedy, they lean on each other for support, finding strength in their enduring bond.
As they approach their 50s, Yayoi and Taro finally confront their true feelings for each other. They realize that they have loved each other for over 30 years, and decide to begin a new chapter together.
The movie ends with Yayoi and Taro walking hand in hand, ready to face whatever challenges life may bring, knowing that they have each other to rely on. Their love has truly stood the test of time.