After finishing the fight with the Acceleration Research Society, Kuroyukihime and the other members of Nega Nebulous have finally found the resolve to face the White Legion, Oscillatory Universe!
In preparation to challenge White Cosmos, they know that a peace treaty with the Green Legion is something they must have. In order to hold talks with the Green Legion's Leader, Green Grande, Haruyuki heads toward their home base located in Shibuya, but the one lying in wait for him there is...Kuroyukihime in a swimsuit?!?