Tied up behind her back, forced to masturbate behind her friend's back, humiliated at a neighbor's house, and cuckolded... After I saw Hina diary, there was no going back. My Hina, Mihina, is cute, kind, and an ideal lover. However, she doesn't seem to enjoy sex. One day, I discovered Hina's diary and learned about her past. Her sexual experiences were written down in detail. I was jealous, but I was also aware of my excitement. When I tried out the SM goods I had bought...