I picked up the dragon girl at the beginning and I used artillery fire to liberate the other world

Bai Yan traveled through time and space to a world of swords and magic. Elves, dwarves, humans, monsters, dragons, and demons from the abyss? The church that rules the mind, the gods that dominate everything? What kind of shock can the creation of machine guns and cannons bring? Let's see how His Highness Bai Yan, who is proficient in both firearms and magic, builds his own huge empire. ...