Fifteen years earlier, a child named Iroha Utsugi and her parents are among those denied entry into Fenrir since Fenrir only allows entry to God Arc candidates and their blood relatives, and they all test negative. Iroha's family adopt an abandoned baby and name him 'Lenka'. Eight years later, Iroha and Lenka's mother falls ill, so they join a search party to find medicine for the sick...