Beat Blades Haruka - Episode 1

The story is about Takamaru. He studies at the Ten Treasures Academy and dreams to have an affair with a girl. His love affairs are always interrupted by Shihodo Narika. He happens to be renting an apartment from her father. One day the boy's wish was heard, and a real beauty, Takamori Haruka, was transferred to the academy, with whom Takamaru immediately fell in love. That same night, he and Narika are pursued by a group of mysterious ninjas. When they think there is no hope for rescue, Haruka, dressed as a ninja as well, suddenly shows up. Calling Takamaru a "young master", Haruka asks to have sex with her. It turns out that she needs sex to recharge her superpowers, without it she won't be able to defeat these ninjas.