The world started to be transformed after the sudden appearance of monsters in it, called dragons. After this began to be born a girl, able to manage them. But, as always, there exists an exception to the rule - namely, a guy named Yu Mononobe as well endowed with these abilities and the existence of which is carefully concealed.One day he entered the women`s academy Midgar and immediately gets into an embarrassing situation, facing a naked student named Iris. Also here it is waiting for another meeting, this time with a younger sister Mitsuki with which they were once separated. ranobe Juuou Mujin no Fafnir by Tsukasa.