Why does this girl appear in AVs? ``I want to be tied up.'' she answers. ``Aika Kasumi,'' a 21-year-old female college student majoring in piano in the music department, is pretty and innocent...sometimes a pervert. What is the truth behind such a young lady appearing in AV? A documentary about a delusional girl who can't stop masturbating every day. This is a novellatte where you can get to know the youth of today.