Construction on Sasaki's otherworld tunnel has been proceeding at a rapid pace, but it may have finally hit a snag when the workers unearth a massive underground ruin full of undead monsters. To neutralize the threat and satisfy Peeps's boundless curiosity, The pair venture deep into the mysterious subterranean city. Back on Earth, while Sasaki has been barred from Japanese soil, there is little time to be depressed, because Type Twelve has planned an elaborate family holiday aboard the UFO. Ensign Inukai joins them as a government-ordered monitor, but is there more to her mission than she' s letting on?
