Maji de Otaku na English! Ribbon-chan: Eigo de Tatakau Mahou Shoujo - the TV

Synopsis

The story centers around Ribbon-chan, a girl struggling with English who becomes a magical girl when she makes a contract with a self-described familiar named Toner. She aims to become a super heroine who can fill the Tokyo Dome arena with her singing and dancing.

(Source: Anime News Network)