Lr17
Cold x cheerful, best friends before being transfigurated and now are strangers who don't/do get along, miss non transfigured ver of eo, "next demon lord" x supposed to be evil fiancé, ml is acc an egohist asshole, fl is so cute and nice but now she has the demon lord's medal, evil divination teacher, loner x popular, opp attract, have a pull towards eo, protagonist wants to survive and prevent the demon lord to revive, isekai is a story ab the light ml and the shadow fl fell in love, were harassed by the ml's fiancé, and killed the demo lord (demon lord killed the fiancé and her lacraia too)
The Daughter of Evil and Miss Devil