Meikyuu Metro: Mezametara Saikyou Shoku Datta node Shimarisu wo Tsurete Shinsekai wo Aruku

When Abe Shuu who just started working opened his eyes, what he saw in front of him was a completely changed scenery, Tokyo 100 years in the future... Even worse, he is at the 50th underground floor of the Ootsuka Metro, which is like a maze completely overrun by monsters. Wandering around, not know