Rio is married to Kazuyuki, the only son of Shigeo, who was her boss at work, and lives a life without any complaints. However, she had certain feelings that she could not tell her husband. Those are feelings for Shigeo... Her son, Torio Kazuyuki, got married because she wanted to be with Shigeo. And although Rio continued to suppress her feelings, thinking that she just needed to be near him, she wanted to spend time alone with Shigeo.