Atsushi has been a ronin for several years. His parents tell him that this is his last chance, financially and age-wise, and so they hire Reiko, a veteran private tutor with a reputation for her amazing skills. However, Atsushi is not only bad at studying, but he is also a virgin, and he can't concentrate on his studies because he is distracted by Reiko's body, which exudes pheromones. In order to solve Atsushi's worries, Reiko begins a special Spartan training program. Will Atsushi be able to successfully graduate from being a virgin and become a full-fledged man?