Akujo ni Shitette Itta Jan! Namida

"I'll become a magnificent villainess worthy of being under the command of the demons!" Amelia, whose holy power was stolen by her stepsister and who was driven out of her home, finds herself in despair when she encounters Regulus, the Demon King who rules the forest. Cursed by Regulus, Amelia joins the ranks of the demons and decides to live as a villainess. However, she has absolutely no talent for being a villainess! Every "evil deed" she commits turns out to be a "good deed." At the Imperial Academy, which she enrolled in under the guise of training, she ends up being called the "Great Saint"!? She wants to become a magnificent villainess, but how did things end up like this? A chaotic school fantasy full of misunderstandings!

(Source: Jump Toon, translated)