Youthful student named Shinn Akatsuki comes back to his high school as a advisor for the under performing mathematics student, at the apparent request of their main. Although an impeccable and courteous man on the outside, Shinn hides a very dark side to him: as part of the unending perversion, he loves witnessing girls that he considers "out of everyone's league" succumb to him. Never satiated before, nevertheless, he discarded his past victims. But now, Shinn decides to create his "ultimate lovemaking harem", and with all these dark thoughts in mind, and selects the candidates he considers "ideal" as he becomes acquainted with the college: the star of the track and field team, the wealthy and disoriented tennis player Ritsuko Yasuhiro, the virginal and tomboyish Makoto Shinjugai, the graceful, severe and traditional Satuski Katsuragi, the swimming team's promising, the basketball star, Touko Takatsukasa and dutiful and seductive Aina Aozaki,. Since he commences his "hunt", Shinn also adds sexy gymnastics instructor Rina Akiyama to his zeal after she makes an impression him with her nice curves and maturity. And consequently, under the pretense of a "responsible adviser" and the aid of his one remaining past lovemaking lover, professor Reika Tohno, the protagonist's wicked quest to create his ideal harem for lovemaking.