The protagonist was reborn from the apocalypse, back into the present. In order to prepare for the inevitable, he decided to build his own fort. However, after waiting and waiting, three months had passed but the apocalypse did not come. The world was still peaceful. At this time, a familiar guest arrived and proclaimed himself as the saviour of the world.　　 “To be honest, I really like this fort of yours. It helps my PTSD recovery. Can I know what’s the rent? “What kind of PTSD?” “To tell you the truth, you probably won’t believe me but it’s the PTSD as a result of the apocalypse. I’ve just prevented the apocalypse from happening.” “I believe you.”　　 Shou: “I’ve returned after being reborn! I’m ready for the apocalypse!” Gong: “I’ve returned after being reborn! I’ve prevented the apocalypse!” Shou: ? Gong: ?