Tatakau Heroine mo Makeru to Kono Zama desu (2011)

Blurb
In this collection of short fantasy stories, strong women battle it out with all their force and wits, but will that be enough to get them out of sticky situations?

Magical girls Chocolat and Pudding are the best dynamic duo team that protects Earth from the forces of Evil. On the way back to school, Pudding notices something fishy and goes to investigate when she is suddenly wrapped up in maniacal Satano’s evil den. Pudding then does her best to hold out until her trusted friend Chocolat comes to her rescue ...

A high school girl tries to unseat the upper class students from student council, another girl seeks revenge from an oppressive government, rookie wrestling star looks for her missing senpai, a space cop is ambushed by an enemy force, a young boy wakes up and finds out he’s transformed into a woman, and an upcoming pop star goes to an audition of her life (and her boyfriend secretly follows).

From high school drama to space invasion, these strong women have much to overcome!

Source: www.anisearch.com/manga/12836