Grimms Notes The Animation S01E03 - Cinderella of Recollection

The story moves to the past. Ex is still living in the town where he was born, spending his days with a girl named Cinderella. Ex lost both his parents when he was little, and Cinderella has lost her mother. The two of them grow up supporting each other. Finally, the day comes when Cinderella's fate will change forever. That's when Ex meets a girl named Reina in the forest.