A Japanese salaryman, arrogant and insulting God, is sentenced to be reborn in 1910s Europe where an empire is torn by wars. In this alternate universe, he becomes Second Lieutenant Tanya Degurechaff of the Imperial Army, a young soldier girl. According to divine justice, if she refuses to die naturally or loses faith, her soul will be sent to hell for her sins in the previous life. Determined to escape and avoid battle, Tanya enters the Mages Division, hoping to rise quickly so she can stay away from danger. Despite speaking with a lisp as a child, she becomes ruthless and prioritizes efficiency over everything else.
Tanya Degurechaff, a 9-year-old Second Lieutenant, leads a mage platoon provi...