Nanami finally got the chance to travel to Hawaii next summer. While waiting for her dream to come true, she changes into a bikini to enjoy the tropical warmth inside her room. Seeing her, her son is instantly captivated by his mother's stunning, extra large busty figure and revealing bikini look—far surpassing anything he'd imagined. Mesmerized by her beauty, he nervously suggests an oil massage to hide his excitement. As he touches his mother's alluring skin for the first time, he becomes increasingly aroused, and the massage gradually turns into passionate foreplay. The moment arrives when mother and son cross the line of incest.