You are the illegitimate son of a noble and for this reason you are born as mage but spent your life without know it.
One day Old Osmond notice you and offer to let you enter the academy as new student and learn magic like anyone else but one day, during your familiar summoning, you summon a strange woman with a crystal in the chest.
The night of the cerimony you have a strange dream where a self proclamed demon god explain to you that you summoned one of his familiars that will grant you the chance of make your own harem.
