BauerIvan last edited by
Not wanting to remain a NEET, 30 years old Arata decided to join a private military and security company. While having fun during the training and getting good scores, soon he has to face a real war.
Author: SHIBAMURA Yuri
Artist: Shizuma Yoshinori
Status in COO: 5 Volumes (Complete)
Manga Adaption: Yes (Link)
Anime Adaption: No
Here's my vote. It's an interesting series although the fan-translations are some of the worst I've ever seen.
First two volumes of the Manga are free right now on Bookwalker Japan (Japanese language only of course).