Actually, I love it! I'm a boring high school student, and my cute little sister is nothing like me. It's nice that she adores me, but she clings to me more than necessary, and wanders around the house in provocative outfits... I'm in my teenage years, and my heart is racing at her body! Sometimes she's proactive... sometimes she's devoted... I finally crossed the line as she seduced me with all her might, and while feeling guilty, I became addicted to her body... This is an erotic comedy about a sister with a slightly unusual sexual fetish, Riri, who is attracted to her "perverted brother who lusts after his sister," and her timid brother!