Read manga: Planet Guardian

manga
Genres: Comedy ; Fantasy
Artists: KOUSAKA Rito
Status: ongoing
Latest chapter: Vol.1 Chapter 2
Updated at: Aug 25, 2019
Summary:

Koyuki chan is a middle high schooler, kinda coward one. She doesn't like it but she is the chosen one, she has to fight against evil aliens and send them back to their galactical prison. Luckily she's helped by her brother who is a magical girl otaku and by Pyrosuke, her guide. This is a funny manga, quite not like other MG ones, adapted from a RPG-like video game.