Nigoru Hitomi de Nani o Negau Highserk Senki

Raizo Takakura, an ordinary office worker, dies of a sudden heart attack... only to be reborn in another world. But this is no fairy tale of a hero blessed with cheat skills.

He is Walm, a common foot soldier in the embattled Highserk Empire, thrown onto the front lines of a brutal, unending war. Surrounded by the stench of blood and death, he must rely on his wits and his comrades to survive one desperate battle after another.

His enemies are not just soldiers. They are powerful adventuring parties, and even summoned "Heroes" celebrated for the overwhelming power that can incinerate all in their path. In the midst of these life-and-death struggles, Walm begins to awaken a talent for slaughter he never knew he possessed—even as his eyes grow dark and cloudy with every life he takes.

From the pages of Shōsetsuka ni Narō comes a unique, gritty war chronicle.

[From Fanzex]