プロトコル・リュウグウ

In a near-future Earth gripped by a new ice age, a global war for survival has reshaped humanity. The victors built a paradise on the few remaining habitable lands, while the defeated were driven beneath the sea, where they evolved into something entirely different. Now, in a world sealed by ice and threatened by forces rising from the ocean depths, a new struggle begins. Obtain the UFO and claim dominion over the Earth.