After a long hospitalization, the younger brother was physically and mentally exhausted. One day, he received a visit from his older brother and his wife—his sister-in-law, Miki Yoshii. She smiled gently, moved around his bed, and helped clean up. Her caring presence gradually stirred his heart. Drawn to her mature charm and elegant, voluptuous figure, he couldn't suppress inappropriate urges. The pent-up desires from days confined in the hospital led him, after their visits, to repeatedly close his eyes and indulge in lewd fantasies of violating his sister-in-law. One day, Miki visited him during his rehabilitation walking practice. As she kindly assisted him, she further unsettled his emotions. Within him, intense feelings toward his sister-in-law began to take root.