Rikako Yamaguchi

The story revolves around high school girls who discover the appeal of motorcycles. Sakura Hane is a high school student who looks a little bit like an airhead. On the way to her all-female high school one day, she is worn-out climbing a hilly road with a bicycle, but she sees a girl named Onsa Amano who is riding a motorcycle. Sakura immediately becomes interested in motorcycles, and she and Onsa join the motorcycle club at the school. Then, Sakura sets out to get her license.

With the sudden appearance of the monsters that came to be called Dragons, the world had completely changed. Before long, within the human race supernatural girls with the power of the dragons, called "D," were born. The secret existence of the only male "D," the boy Mononobe Yuu, was forcefully thrown into the school where the girls of "D" gathered-Midgar, where he saw the naked body of one of the students, Iris. Furthermore, meeting his long-lost sister Mitsuki, Yuu seems to have been enrolled into this school...?! "When there's really no other choice, Iris, I will-kill you." "Can I really... believe you?" The curtains open as the "one and only story" about the boy who was supposed to become the strongest assassin and the incompetent girl unfolds-! Unlimited School Battle Action!

What is justice, and what is evil...? Japan has suddenly fallen into an extreme situation, and behind the chaos is a group of mysterious invaders, called the Septentriones, who are flinging the entire nation into the depths of despair! Is this a test for the human race? As this epic, cruel reality continues to trifle with the people, thirteen individuals with unique characteristics form contracts with demons to become the "Devil Summoners," giving them the power to fight the invaders. This is the story of the conflicts and discord faced by the many people caught in this extreme situation.