Scaramouche was in his attic, putting some things away and he somehow found an ancient book with lots of summoning circles and rituals for ancient demons.

While he was flipping throughout the pages, he comes across a humanoid demon with horns on its head and body markings on its chest. The demon's name was Kuni..

Scaramouche gets all things to summon him, and out of curiosity does the ritual correctly. And it worked. Kuni has been summoned in the human world, in Scaramouche's attic.

"H-Huh..? Woah.. It actually worked.."