My niece is moving from the countryside to Tokyo to attend university, and until she finds a new home, she's living with me, her uncle. When I arrive at the meeting place, I find the still-childish "Ao" standing there. Once we start living together, I'm taken aback by her defenseless behavior, changing clothes in front of me and taking showers with the door open. One day, when I come home from work, Ao uses a vibrator...
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