10 episodes · 2021

Mamiya Hibiki is a sincere young man with a bright personality. He works as a car mechanic and lives with his girlfriend, Ogasawara Kurumi. They have dated since they were high school students. Hibiki makes a plan to propose to Kurumi. On the day he proposes to his girlfriend, he slides off a tunnel and becomes trapped. 4 days later, he is able to escape, but he faces a different world. There are no people outside, the traffic system is destroyed, and there are bloodstains on the streets. What happened to the world? Hibiki tries to find Kurumi.

6 episodes · 2021

As a new community, the "House of Hope" has appeared. Who are they with a prosperous civilization? In addition, a golem with an "x" that seems to have been artificially attached appears. A new threat comes to those who survive the "End-of-world".