Left behind at home after her husband's sudden transfer, Yumi felt lonely but cherished the time spent with her son. One morning, she noticed her son waking up visibly excited, and discovered his cock was far larger than her husband's—something that instantly intrigued her, as she'd always been fascinated by big cocks. From that day on, Yumi became obsessed with her son's massive dick. Unable to resist any longer, she gave in and took her son's virginity. Though she knew it was wrong, she became completely addicted to his huge cock. Her heart was increasingly drawn to her son's thick member, leading to an event that would drastically change her life forever.