Acro Trip.

Chizuko is a normal otaku girl in Niigata Prefecture. She’s obsessed with Berry Blossom, a magical heroine who protects the city. But the battles with her inept nemesis, Chroma, have become so lackluster that they’re not even worth watching. Chizuko wants to see Berry’s full power, a desire that quickly leads this seemingly timid girl down a path of evil.