WANZ-939 A grown-up niece playing with her as a pet.

My niece Yui has liked me since she was a child and she seems like she likes to listen to me while she's playing, looks like I've been totally despised and said, "You're my servant," and three months later, she'll grow up with each regular meeting, and she'll also show a 10-year story of being played by a young niece.