Houkago Bitchcraft

Ririka Kirise's a style-savvy high school girl who's struggling to keep up in her chemistry class. Looking for some extra help, she opens the door to her teacher's office—breaking his magic barrier in the process! Unbeknownst to Ririka, Renji is actually a sorcerer...and Ririka has the makings of a sorceress herself. Before she knows it, she's wrapped up in the world of witchcraft as Renji's apprentice—and getting into some sticky situations...

(Source: Yen Press)