My niece moved from the countryside to Tokyo to attend university. Until she found a new home, she decided to live with me, her uncle. When I arrived at the meeting place, I found the still-childlike Yuna there. Our days living together were filled with confusion. Yuna was too defenseless, changing clothes in front of me and taking showers with the door open. One day, when I came home from work, I witnessed Yuna masturbating…