Kotaro never had any interest in his mother's friends. However, one day, he naturally grew close to Aya, his mother's close friend, after meeting her at a restaurant he frequented. One day, Aya suddenly came over to visit. Though Kotaro had been indifferent to her existence, the moment she appeared, he was captivated by her stunning beauty. While his mother prepared drinks at home, Kotaro was asked to keep Aya company. Nervous at first, he soon found himself enchanted by her smile, gradually overwhelmed by uncontrollable fantasies. That moment became the spark that stirred deep desire within him.