My Shop Assistant Says He's a Transmigrator

Across the land are seven kingdoms, home to warriors, sword immortals, mad scholars, Daoist masters, great Buddhas, spirit demons, ghosts and monsters, mystic masters, and chess masters. Most importantly, this is a world where humans and spirit demons live together in harmony! Qin Yi owns a small inn in the imperial capital of the Jing Kingdom, scraping by on his modest business. Out of kindness, he took in a few spirit demons who had shed their wicked nature. He never expected to end up broke from feeding them. His inn was on the verge of closing, but then he happened to meet Qiu Qi, a transmigrator from Earth, and his life changed dramatically. The spirit demons, who had once done nothing but hold out their mouths for food and drain his purse, transformed into a gateway to a whole new world... Qiu Qi: I thought that since I transmigrated here from Earth, I was bound to be a once-in-a-millennium genius, with a cheat ability that knew no limits. Who could have guessed I'd turn out to be just a side character? Qin Yi: “Didn't you say you came from Earth and were some kind of top science student? I'll leave these spirit demons, each with their own special abilities, to you. I believe only under your guidance can they make the most of their talents.” Qiu Qi glanced at the spirit demons, with their fair skin, beautiful faces, long legs, and straight black hair. He swallowed hard, then pounced on them like a starving tiger. “Who cares about being the protagonist? I'm happy to be a side character. This is great!”