Shouta Magatsuchi

真ヶ土翔太,

A young mage who Lucoa starts living with after he inadvertently summoned her. He is convinced that Lucoa is a demon, and though she tries to clear the misunderstanding, her overt antics do little to help her case. He is a fifth-year student at the school Riko and Kanna attend and his father is the director of Kobayashi's company.

(Source: Wikipedia)