My mother did aerobics almost every day, and I really hated it. My father also joined her, which kept their relationship strong. I didn't care much about my parents' bond. Then one day, a new housekeeper named Sayaka-san came to our home. There was something distinctly feminine about her, and we soon became intimate. After experiencing a woman for the first time, I began to develop a new curiosity toward my mother—the very person I once despised. Before I knew it, I was secretly watching her aerobics sessions. What started as mere curiosity gradually began to change my feelings in ways I couldn't control.