Is She Really a Witch Hunter? - S1.E5

Marin Nijihara, one of the few Witch Hunters left in the world, has come to bring divine justice upon the witch Ayumi, but it won't be easy since Ayumi's so powerful and Marin's a ditz. So Marin is determined to attack Ayumi's weakpoints, which involves pestering her around school until Ayumi can't take it anymore. Eventually, Ayumi takes on Marin in a final magical showdown... until Haruo shows up. Afterwards, Ayumi, Yuri, Maika, and Marin (who now has a crush on Haruo, thinking that he is a saint who keeps Ayumi's magic powers at bay) all prepare boxed lunches for Haruo to eat, but each girl suspects that the others have put in something weird in their lunches. So, they decide to have a taste test to make sure there's nothing wrong in them.