Kana has a secret she can't tell anyone—her instincts manifest uncontrollably through the movements of her ass, completely independent of her will. Once unleashed, her consciousness is entirely dominated by her buttocks. One day, she moves in next to a man, and the moment her ass lays eyes on him, she's instantly smitten. From that instant, Kana loses all control over her own body. His mere presence takes complete command of her, leaving her defenseless, her mind helplessly hijacked by her own lustful, throbbing backside.