Seija Musou: Salaryman, Isekai de Ikinokoru Tame ni Ayumu Michi

After his untimely death, this salaryman gets another shot at life! When Luciel is reborn into a magical new land, he becomes a healer in hopes of leading a peaceful life. However, he quickly learns that being a healer is much more challenging than he expected. With strict and strenuous training in store, this new life is turning out to be anything but peaceful.

(Source: Crunchyroll)