Takamaru was a student at Ten Treasure Academy, succeeding in ordinary school life, looking for romance that was constantly interrupted by Shihoudou Narika (daughter of his apartment manager). One day, he fell in love at first sight with a transfer student named Takamori Haruka. That night, Takamaru and Narika were chased by a group of mysterious ninja. Haruka appeared in a kunoichi outfit. Haruka regards Takamaru as a "young boss", and asks him to do what must be done. This gives super powers that allow him to fight the mysterious ninja. However, this is only the beginning of a very long battle.