My beloved younger sister Yui. Before I realized it, I started looking at her with lustful eyes. One day, I heard a sound coming from the bathroom. When I peeked inside, I saw Yui masturbating, moaning another man's name while making lewd movements. Unable to control myself, I secretly recorded her. Using that video to blackmail her, she obediently followed every one of my demands. Even though she pretends to resist, her body quickly gets wet and she orgasms. Her shy voice, her body's reactions, her embarrassed expressions and her ecstasy faces—they're all so incredibly cute I can't get enough. I want to cherish this relationship forever. [Thanks to you, KMP celebrates 20th anniversary!!]