Tatsuo developed an exclusive interest in older women due to his first romantic experience being with an older partner. To him, even his mother is simply another woman. Every day, he secretly watches her shower while masturbating. One day, his mother suddenly emerges from the shower and discovers his actions. Responding with gentle compassion, she says, "If only I had noticed sooner..." Caught between reason and instinct, how will their relationship evolve from here?