Ryoko gave birth to Tatsuaki when she was young. Although raising a child at a young age was difficult, her husband was cooperative, and they had a happy family. However, by the time Tatsuaki became a college student, her husband had become sexless, and eventually, his infidelity was discovered. Although they did not divorce, their marital relationship had completely cooled down, and they ended up living separately. During the summer vacation, when Tatsuaki returned home, Ryoko arranged to meet him at the station to greet him and report the divorce.
