What if Hyoudou Issei is the reincarnation of an ancient Godslayer? What if Irina is the reincarnation of a Goddess? Their bonds cannot be broken even by death or time. After thousands of years, through the Age of Gods, the Age of Heroes, and the Age of Kings, they will finally be reunited in the Age of Men, a time when their power will be needed most. Issei x Irina x harem.