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

The Lost Ones are strangers from another world, hailing from a place no onehas ever
heard of called “Japan.” These wanderers have beenassociated with catastrophes since
many years ago and the solemn duty ofexterminating them without remorse falls to
Menou, a young Executioner. Butwhen her mission is complicated by a Japanese girl
named Akari who refuses todie, Menou embarks on a peculiar journey to find
something that can slay evenan immortal who insists on traveling with her wouldbe-killer!