The Executioner and Her Way of Life, Vol. 1 (manga)

The Lost Ones are strangers from another world, hailing from a place no one has everheard of called "Japan." These wanderers have been associated with catastrophes sincemany years ago and the solemn duty of exterminating them without remorse falls toMenou, a young Executioner. But when her mission is complicated by a Japanese girlnamed Akari who refuses to die, Menou embarks on a peculiar journey to findsomething that can slay even an immortal who insists on traveling with her wouldbe-killer!