"My daughter and I have loved each other since we were very young." A 10-year video documenting the twisted love and sexual brainwashing between a father and stepdaughter. Ruka Iwai, SONE-990

This video, filmed by a man living in Tokyo, documents his daughter's growth over the past 10 years. "My dad isn't really my dad. Before I became a middle school student, my mom remarried, and then he became my dad. When I was writing this assignment, I asked my dad about my treasure. And he replied, 'My treasure is Ruka.' But, more than my real dad, I… I like my dad more." This is Ruka's speech during a middle school classroom observation. The theme of her speech was "My Treasure." She was so happy that she couldn't help but cry. Strictly speaking, Ruka and I aren't related by blood. We've just been together since childhood. I've watched Ruka grow up very, very closely. I love Ruka, and Ruka loves me. More than real family. We bathe together every day, sleep in the same bed. We hug and kiss. We probably had sex for the first time in elementary school. I know what Ruka likes, and Ruka knows it too. My sperm never entered Ruka's body. That's why, even later, I want to give Ruka a lot of my father's sperm. I believe that's the role of a father. Ruka, I love you. I love you. I love you. Come on, say you love Daddy. One more time. Say you love Daddy. One more time, one more time, one more time…