After five years of marriage, Rin's work has become busy and her relationship with her husband has begun to show signs of strain. The strain then turns into a rift in their marriage... When Rin is troubled and unable to talk to anyone, her boss Oshima calls out to her and she seeks help. The two of them embrace each other tightly as if sharing the pain of being betrayed, comforting each other. And so, the days continue as they continue to have sex in secret, out of sight of others. However, Oshima notices Rin's complicated feelings as she goes through these days...