Two hundred years ago, the pinnacle of human technology and last remaining civilization on earth —the Great Terra Empire— collapsed, due to a massive invasion by the “Lament,”: a culmination of the world's sins manifested as ferocious, world-devouring beasts. In a last-ditch effort to ensure humanity’s survival, the Emperor decided to divide the empire capital into 33 districts and scatter them across the continent in the form of 5,000 meters-tall “Mobile Fortress” while bequeathing to each port a secret weapons capable of piercing the Lament’s purification shields. —Or at least, that’s the backstory of the dating sim I was suddenly trapped in. [Saihate no Banka]. It’s an absolute trash game. No matter which route you choose, the heroine’s death and the world’s destruction are inevitable. Every single path leads to a Bad End. Now, stuck in the body of an unfamiliar girl and with no-identity of myself, can I even survive in a world that not even the protagonist could save?