The year is 1990, a simpler time before mobile phones were widely available.Yusaku, an office worker, lives a peaceful and happy life with his girlfriend, Yukiko.

One day, he receives an invitation to a class reunion from an old friend.While he is not keen at first, the words “Minami has returned to town” stir a memory deep within his heart.

As the day of the reunion draws closer, the lives of the three of them start to shift and spiral, and the secret Yusaku and Minami once kept comes to light.

The day of no return quietly unfolds.