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I returned to my parents' house where my brother and his wife live for the first time in several years. My niece, Momoka, was still a little girl when I last saw her, but she's grown up to be a cute, grown-up girl. My brother and his wife were out, so I left Momoka alone at their house. She innocently asked me to play hide-and-seek. As expected, Momoka is still a little childish, so I had to play along. Momoka hides in various places around the house. I chase after her. I find Momoka hiding in the closet...