I think this setting is excellent. Congratulations!
- Good idea to use the Patron mechanics.
- I find very original to place the story in a korean setting.
- Good drawings and I think is a great idea to use comic-like dialog to make the NPC talk!
- The maps use the entire page, wich not only looks cool, but also allows you to write the descriptions into the actual locations. 100% usability.
- First time I see a FAQ section in a TTRPG adventue, very clever and useful!