A collaboration between popular author Kuroneko Smith and Moodyz! Kohei, who went to visit his mother's sister and her husband, reunited with his aunt for the first time in five years. She was just as kind and beautiful as in his childhood memories. However, one thing was different from back then: he felt her feminine allure... In his adolescent eyes, his aunt appeared as a "woman." Her voluptuous body was like poison to a growing boy, and a secret love began to sprout. Combined with his sexual desires, he would end up taking impulsive action.