It has been several years since she lost her husband. Shinko, a single mother raising her son Yoichi alone. Although there are times when she feels lonely, her bright and honest son Yoichi and her close friend Shunichi support her. However, one day, Shunichi suddenly disappears. When she asks Yoichi, he only evades the question, leaving her none the wiser. Shinko secretly summons Shunichi... Upon learning the reason, Shinko executes a plan to reunite the two friends.
