Twenty-five years ago, the world suddenly changed when monsters called Dragons appeared; seeking to ravage the Earth and find mates. Over time, superhuman girls possessing the powers of the dragons, called D girls were born.

Mononobe Yuu is the only male D in existence and is forced to enrol at Midgar — an academy for D girls. At the academy, he accidentally runs into Iris, a delinquent D girl, while she is naked, and even reunites with his long lost sister, Mitsuki, from whom he was separated at birth.

Will Iris and Yuu, the boy who is supposed to become the strongest assassin, be able to challenge the seven dragons that threaten to destroy the world?

Source: Crunchyroll

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