Kili retreats after being defeated by Yuu. Yuu devises a plan to defeat Hecatoncheir by drawing it out to sea where he could use Babel without causing any collateral damage to Midgar. Yuu uses an anti-gravity bullet to lift Hecantoncheir into the air and the girls generate a wind to blow it out to sea. The girls weaken Hecantoncheir's barrier and Yuu destroys it using Babel with Tear supplying the dark matter.
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. Yuu Mononobe is the only male “D” in existence and is forced to enroll at Midgar - an academy for D girls. At the academy, he accidentally runs into Iris, a delinquent D girl, while she’s naked, and even reunites with this long lost sister, Mitsuki, whom he was separated with 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?
