History will go about Takamaru. He studies at the Academy of the Ten Treasures. Like any self-respecting ordinary Japanese schoolboy, a guy dreams of scowling some girl. His love affairs are eternally impeded by Sikhod Narik. It so happened that he rented an apartment from her father. Once the boy's entreaties were heard, and a real beauty, Takamori Haruka, was transferred to the academy, where Takamaru immediately fell in love. That same evening, he and Narika are pursued by a group of mysterious ninjas. When they began to feel that there was no hope of salvation, from nowhere Haruka appeared, dressed like kunoichi (a female ninja). Calling Takamaru "a young gentleman," Haruka asks to have sex with her. It turns out that sex is necessary for her to feed the super abilities, without which she can not overcome these ninjas.