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