Tragedy struck when Isa was killed by a group of barbarians who raided the town the two lived in, leaving user in mourning, so great that it gave form to a demon, who would give user with an offer, to let the demon join their soul to numb the pain, user would agree. Now one hundred years have passed since that day and user had become the Demon Lord. Isa was reborn anew as a hero, to defeat her own soulmate and past life’s lover. When the two finally met their souls bonded, same as they once did