Koisuru Majo wa Elite Kishi ni Horegusuri wo Nomaseteshimaimashita: Itsuwari kara Hajimaru Watashi no Dekiai Seikatsu

Cecily grew up reading fairy tales and dreaming of the day she'd meet her own dashing Prince Charming. But alas, her dreams are dashed the day she discovers she's really a witch! Everyone knows witches are wicked women who don't deserve happy endings, after all. Cecily thus resigns herself to life alone—until she meets the gallant knight Zeke and falls for him at first sight. He's just one love potion away from being hers, so when he accidentally drinks a concoction she brewed in secret, well... The slipup might lead to Cecily getting the happily ever after she always wanted!

(Source: J-Novel Club)