Anime Like FIGHT!! Spirit of the Sword
A kid finds out he's the only thing standing between normal life and literal hell breaking through, armed with a sword that does the thinking for him. One episode to prove he's worthy of it. The magic system doesn't explain itself, the demons don't wait for backstory, and Yonosuke has to figure out what he actually is while something's already trying to kill him.
SYNOPSIS
Yonosuke Hikura lives a double life. By day he's just another high school student coasting through classes, but he carries a secret that separates him from every peer around him: he's the guardian responsible for maintaining balance between the heavens and the earthly realm. When demons break through dimensional barriers and escape into the human world, Yonosuke must step up with his magical sword Chitentai in hand, aided by his ally Tsukinojo Inbe. Together they hunt down these supernatural threats and force them back where they belong, preventing catastrophe from overtaking ordinary people who have no idea how close danger really is. The tension between his mundane student existence and his extraordinary responsibilities drives the story, as Yonosuke discovers what it truly means to be chosen for a burden this heavy. Part action-packed supernatural showdown, part coming-of-age struggle, this OVA pits one teenager against forces most people will never comprehend.
