My Trading House Connects to Another World

Updates around midnight Qiao Bei is an orphan who was adopted by his grandfather when he was very young. His grandfather, a lonely old man, runs a trading house. After Qiao Bei turned eighteen, his grandfather began teaching him how to run the trading house, as well as... draw talismans. That's right, the kind of thing you see on TV that looks like a scam to fool children. Then his grandfather used a talisman to summon lightning, start fires, and clean things... smashing the worldview Qiao Bei had held onto for eighteen years. Qiao Bei, eyes wide with shock: "..." So those pungent medicinal baths I've been soaking in for over ten years weren't just for show?! 1. Main character is the seme, and the CP is pretty much decided: Geto-sensei. 2. A crossover with various works. Feel free to make suggestions; I'll consider writing the ones I've read. Premise: Take good care of the family business.