Father's woman

My father was once the ace that the martial arts world hopes for. However, now my new employee's practice partner, my mother, who has lost all her affection for her father, leaves, and I live in a small apartment with her father. One day, that woman came. Confused by the woman who flirted with her father without worrying about what to do with her, I was troubled by the sight of her, and I was locked in my room, but my father had not heard from me and disappeared a few days later. Then, a strange living life began with my father's woman who suddenly started taking care of me.