Love You as the World Ends

26-year-old car mechanic Hibiki Mamiya lives with his high school sweetheart of the same age, Kurumi Ogasawara. Life together feels natural and warm, a happiness they expected to last a lifetime. Hibiki is secretly preparing his proposal when misfortune strikes: a tunnel collapses, trapping him for four days. He barely makes it out alive and discovers a world utterly changed. There is absolutely no one around, communications signals are dead, the transportation network is a wreck, and the only information available is the emergency evacuation order being repeated on the radio. Everywhere Hibiki goes, he sees bloodstains. Just what happened to this town?!