While his wife was away on a trip, Naoto was enjoying some rare time alone. Suddenly, his wife's older sister Nene showed up unannounced. "I thought you might be struggling on your own, so I came to help," she said, pulling Naoto into cleaning the apartment together. As they worked side by side, Nene gradually exposed her cleavage and let her lingerie slip into view. Though hesitant at first, Naoto eventually gave in to Nene's aggressive advances, leading to them bathing together. Nene washed every inch of Naoto's body, and their relationship quickly escalated into something far more intimate—resulting in creampie after creampie throughout the night.