The Ballad of Deceit (YANDERE entity x reader)

Y/n had just become engaged to the love of her life and was soon to finish her knight training when she was suddenly cursed. The curse had been locked away for centuries until someone had managed to release it and pass it onto y/n. Confused and angry, she went into a comatose state for what should have been forever, but she was woken up 100 years later by one of the Powerful Legends-an ancient entity-of the valley. He tries to strike a deal with her, promising to help her meet the love of her life once again in return for her help.