Morihito Otogis family is descended from a long line of ogre familiars, and he has the inhuman strength to prove it. One day, his father comes to him with the life-changing news that he is to become the familiar of his childhood friend, the teenage witch

The Saintess of the Sea Concubine Palace, in her summoning ceremony, summoned the lowest ranked companion as her soul pet- the water elemental.

When he was young, he failed at the Magic Academy and was looked down upon by others. However by chance, he discovered a mythological medicine, so he obtained an immortal body. In order to get revenge on the people who made fun of him, he began researchin