Yuito wakes up in a world that has already moved on without him, where humanity isn't fighting to win but just trying not to disappear entirely. The show treats every death like a real loss, every safe zone like borrowed time, and every relationship like something you're stealing from the future. By the end, you'll realize it wasn't about surviving the Blue at all, it was about whether survival is even worth the cost.

Yuuji Kaidou, a young man with an incurable illness, chooses cryogenic sleep in the hope of waking once a cure exists. He comes to more than two decades later, in the year 2031, surrounded by man-eating monsters. The Blue, a giant insect-like alien species, invaded Earth years earlier and have pushed humanity close to extinction. A squad of soldiers piloting large combat machines rescues Yuuji at the last moment, and their leader, Marlene Angel, tells him what has become of the world. Shaken by this nightmarish reality, Yuuji joins the resistance against the Blue, where resolve alone will not be enough to make a difference. The show blends mecha combat, horror and psychological drama with romance in a bleak science fiction setting.