End of Arcadia

is a Japanese light novel series written by Aoi Yuuto, with illustrations by GreeN. The series began publication on March 10, 2022 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series won the Gold Award in the 28th Dengeki Novel Prize.

Synopsis
He and she were enemies. Until he knew he had the same loneliness in a dichotomized world. They are cheap, strong, and never die. The ultimate life regeneration system "Arcadia" was born from teenage soldiers who fight by making full use of the complex regeneration . They were invincible boys and girls (children who transcended death) who died on the battlefield and revived. The forefront of the war in which the two great powers compete for hegemony. Akihito, a boy who leads a platoon as an ace of the United States Army, is ordered to collect confidential information that is inevitable to be wiped out because of his poor performance. However, Akihito, who has kept his companions in an unexpected battle and collapse, is isolated deep underground where complex regeneration is impossible, along with his fateful nemesis, the elite girl Philia of the Federal Army. Two people who have opposite personalities and skills and have the worst compatibility will cooperate and aim to return to the ground. The story of the encounter and resonance between him and her who continued to die on the battlefield that never died begins!