Yuko visits her adult son in Tokyo to look after him after he begins his career there. But after making the trip again and again, she starts loving him as a man. She knows their feelings can never be accepted, yet they cross the forbidden line between mother and son. Tormented by what they have done, Yuko keeps her distance for a while—but unable to forget their sweet memories, she travels to him once again this month to be held in his arms...