Morihito Otogi, a high school student from a family of ogres, lives a peaceful and ordinary life until his childhood friend Nico moves in with him. Niko learns sorcery and chooses Morihito as his familiar. While Nico is excited to reunite with his old friend and cuddle him, Morihito is tasked with a dangerous task: protecting him from a prophesied calamity. Between the unpredictable chaos caused by Nico’s magic and the awkwardness of sharing a house, their lives become a whirlwind of thrills and supernatural threats.