Kouichi moved in with his aunt Manami, who lives in Tokyo. For Kouichi, a student at a welfare vocational school, Manami had always been a kind and affectionate figure—someone he'd secretly loved since childhood. This new living arrangement brought him excitement on many levels. However, Manami continued treating him like a child every single day, causing Kouichi's frustration to grow steadily. Unbeknownst to him, her behavior was not indifference, but a deliberate, seductive trap—her way as a woman of exposing the hidden desires he tried so hard to conceal.