고등학교 시절부터 연인 사이인 여자친구에게 몰래 청혼을 준비하던 주인공은 불행하게도 터널 붕괴 사고에 휘말리게 되고 가까스로 목숨을 건져 터널을 탈출하지만 세계는 전혀 딴판인 상황, 본 적도 없는 위협이 줄줄이 닥치는 절망적인 상황에서 죽음과 이웃한 '종말의 세계'를 경험하게 되는 절체절명의 서바이벌 러브 스토리

　　间宫响（竹内凉真 饰）是一名汽修工，他和恋人从高中时代就开始交往。某日，间宫响遭遇事故，被困在隧道里整整四天。当他从隧道里逃出以后，世界竟然变得像世界末日一般：街上空无一人、交通系统瘫痪、信号中断，街面也满是血迹，于是间宫响决心寻找自己的恋人。

汽車技師間宮響在計畫向女友來美求婚的那天，不幸捲入隧道崩塌事故，遭困4天後終於驚險逃出，世界卻已完全走樣：荒蕪的街道、中斷的通訊、滿地的血跡，以及神出鬼沒的恐怖活屍…遍尋不著來美的響忐忑不已，這4天究竟發生了什麼事？倖存的人們是敵是友？在世界末日的極限狀態下，響能找到最愛的來美嗎？

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.