TS Eiseihei-san no Senjou Nikki

A pro FPS gamer (♂) is reincarnated into a world filled with magic... Only to be greeted not by a dreamy fantasy kingdom, but a muddy battlefield filled with flying bullets! Moreover, he's now an orphan girl named Touri Noel?!

After her aptitude for healing magic was discovered, she decided to volunteer in the army as a medic to raise money for the orphanage where she was born and raised. However, without even getting any training, she was attached to an assault squad and thrown into the cruel battlefields of the "Western Front." Her mission was to be the personal medic of the front line's ace, Garback, and keep him alive no matter what. But he turned out to be the worst commander, who tried to get results at an...