D-Genesis: Three Years after the Dungeons Appeared Volume 6

America and Japan prepare twin responses to a crisis in Yokohama Dungeon, with D-Powers and Team Simon caught in the middle. Plus, Keigo and Miyoshi prepare to go public with one of their greatest secrets. And a chance encounter answers all of their questions about the origin of the dungeons, and then some?! The clock is ticking. Get ready, get set, go research!