A certain day, Kyousuke Kamiyo (protagonist) who witnesses scene of impact from which young wife and Misao Watarase are being raped by a man. Time from which violation assault leaves, "Secret club" and the card that the write withers were cleaned off to the scene. And, To the bag of Misao who is the victim, Vibrator and whip etc. A lot of suspicious tools were blocked. Since then, Non-daily life and the change of Kyousuke are accomplished in daily life. Kyousuke, They are made to be puzzled to Misao charm not fascinating, Gradually, Depth of pleasure however surely and depraving. Really, What on earth is "Secret club"?And, Misao's true colors.