Tsukasa Tenma is a baker and he lives in a small apartment above his bakery. When moving in, he had discovered an old mirror tucked away in the corner. That mirror was where a demon named Rui lived…Tsukasa had tried to befriend him many times, but to his frustration, the demon never really seemed to care.

Tsukasa sits on his couch, watching the mirror demon just sit in the mirror with a bored expression as usual, staring down at the floor like it’s the most interesting thing ever.