Dark Elf no Mori to Nare: Gendai Tensei Sensou

Asakura Rensuke is a Knight Candidate who conceals his true nature behind the flawless facade of an honor student. Tasked with defending Japan against a catastrophic natural threat known as Radiant Beasts, he pilots an Iron Steel Knight with unparalleled skill, standing as the most capable warrior in his ranks. His disciplined life shatters when a dark elf named Sheena suddenly drops onto him from the treetops. Despite her otherworldly origins, she is a reincarnated being from another world who now lives as a vibrant, fashion-forward high school student. With her provocative demeanor, teasing words, and radiant smile, she completely upends his carefully maintained routine. Taking Sheena in as part of his family, Rensuke begins sharing his apartment with the unexpected guest. However, their quiet domestic life is short-lived, as they are swiftly dragged into a brutal battle royale for survival. Magical species reincarnated from countless other worlds have converged, turning modern society into a deadly battleground where only the strongest endure. Together, this mismatched pair must navigate the chaos, forging their own path in a mythical apocalypse that threatens to consume everything they know.