Shiitagerareshi Reijou wa, Seikaiju no Omo ni narimashita

The girl, Fiore, is a countess's daughter and yet she is treated unfairly. Every day she endures terrible punishments, including the breaking of her engagement and the setting on fire of a young tree that was a memento of her late mother.
One day, however, a handsome young stranger appears in front of her. His name is Alm. He is the incarnation of Yggdrasil that protects the world, and Fiore is his master...
A Cinderella fantasy about the power and destiny hidden in an oppressed girl.