My Own Path to Hunting Monsters

What should I do if I travel to another world? I can rely on my appearance to earn a living. What is this, a European medieval world, with poor food and white walkers running rampant? That's very embarrassing. I have 108 monster hunting postures and 3,600 monster hunting techniques. No matter angel or devil, can a cannon kill mosquitoes? Firepower is justice wherever you look.