Naho can't get closer to her stepson Koji. Worried, she decides to take the plunge and barge into the bathroom while Koji is bathing. The best way to have a heart-to-heart talk is to be naked together. It's a drastic measure, but it's also meant to bring them closer together... However, Koji's reaction is unexpected. He is clearly excited as he stares at Naho's naked body. Naho's actions ignite the forbidden feelings that Koji had hidden deep in his heart.