There once was a princess who fell for a curse. Countless times have a knight come in vain attempts to save the poor princess. They all failed, killed by a demon. When a knight finally comes to defeat the demon, there appears an adventure never before predicted...

(Source: Batoto)

From: Easy Going Scans

A Demon Lord spirited the Princess away, and cursed her with eternal sleep. Countless knights sought to save her, only to die in vain by the Demon Lord's hands. But then, a Nameless Knight arrived to vanquish him and save the Princess, ignorant of what fate had in store for him...