Konyaku Haki sareta Koushaku Reijou wa Mori ni Hikikomorimasu: Kuro no Grimoire to Norowareta Majo The Abandoned Duke's Daughter Is Hikikomori in the Forest

Synopsis

The morose duke's daughter Chloe, with a magic book. Her discarded engagement to the prince. Chloe is kicked out of the forest, but in fact, the black book is the strongest magic book! "I do not need to pretend to be dull anymore." Chloe will have fun with the phantom beasts with its power. However, the magic knight Ernesto appears, and the situation changes completely! He said that he was about to be killed by Chloe, and suddenly said, "If you're a bad witch, I'll kill you"...?! (Source: Kadokawa, translated)