A collaboration between popular author Kuroneko Smith and MOODYZ! Kōhei goes to visit his mother's sister and her husband, and reunites with his aunt after five years. She was just as kind and beautiful as he remembered her from his childhood. However, one thing was different from back then: he felt a sense of feminine allure from her... In his adolescent eyes, his aunt appeared as a "woman." Her voluptuous figure was intoxicating to a young man in the throes of puberty, and a secret crush began to blossom, combining with his sexual desires and leading him to act impulsively.