Arthur was reincarnated into another world and hypnotized at fourteen to fight in a war.

Ten years later, the hypnosis finally breaks.

The problem? Arthur remembers absolutely none of it.

Everyone else, however, remembers him as a legendary war hero.

With his past exploits earning him a comfortable retirement, Arthur accepts a three-year teaching position at the Einar Imperial Academy. There, he is expected to teach combat to some of the empire's most troublesome students, including the Hero's crossdressing daughter, an imperial princess, and a hostile prince.

There's just one problem.

Arthur has no idea how he became a legendary warrior in the first place.

Fortunately, his body seems to remember even if he doesn't. When challenged to a duel, his muscle memory takes over, leaving Arthur to somehow maintain the reputation of a war hero whose greatest accomplishments he can't even remember.