The story of a seemingly slender, neat and clean female college student. Contrary to its innocent appearance, it is a horny female college student who continues to scold professors' chi-po to acquire university credits. Metamorphosis that can be taken on with painful play. Her masturbation that was pierced with a hard piston as professor's desire and reached a climax is no longer controllable and can not stop! ! See the dangerous mischief that takes place behind campus life.