Kaitaro, attending a prep school in Tokyo, was staying at his aunt Shiori's house. Shiori had always been someone he admired since childhood, and life with the kind, beautiful woman was enjoyable. However, she often appeared surprisingly unguarded, especially when breastfeeding—something Kaitaro found impossible to look away from. Though he couldn't bear to look at his aunt with lewd eyes, complex emotions began stirring within him. Seeming to notice his feelings, Shiori mischievously smiled and asked, "Could you help me with milking?"