Three years after returning to his hometown, Kazuya finds himself drawn to his mother, reminding him of his teenage years. Lately, he's been spying on her masturbating or using a flashlight to look at her underwear while she sleeps, getting aroused by it all. Drunk and overwhelmed, he confesses these actions—only to discover his mother already knew everything. Seeing how much Kazuya has grown into a strong, mature man, her body begins to tremble with desire.