After my mother passed away, leaving just my father and me in our all-male household, my mother's younger sister, Aunt Ayako, came to live with us. With her husband also gone and no one else to rely on, she decided to move in. Ever since childhood, I had deeply admired my aunt, so sharing the same roof felt inappropriate, yet incredibly thrilling and exciting. It marked the beginning of a new family life—until one night, I heard my aunt moaning from my father's room.