If you are planning to travel to Korea and consider 5 restaurants below?
Honggo at Mapo looks good.
Kyochon Pilbang - Chiken Omakase - not recommend because interior looks good but the food is not worth the money based on many reviewers.
Pairing room - note: need to call for booking if it's 1 person
Hongojib - Yeonnam-dong -> looks good
The Ninth Gate - Western Josun -> looks good. A bit pricy.
You can book many restaurants at https://www.catchtable.net/
Personal recommendation, if you want to try Korean traditional dish.
Traditional Korean Food in modern style
https://www.instagram.com/thedam_dining
Other resources
Korean traditional style cafe
https://korean.visitseoul.net/editorspicks/%EC%84%9C%EC%9A%B8-%ED%95%9C%EC%98%A5%EC%8B%9D-%EC%B9%B4%ED%8E%98-%EC%B6%94%EC%B2%9C_/31658
Have a look for your plan
https://english.visitseoul.net/editorspicks/daehak-ro/ENNqspwpk
https://english.visitseoul.net/editorspicks/Seoul-Book-Cafes/ENN039900
https://english.visitseoul.net/editorspicks/Top-3-Must-Go-Beautiful-Fall-Hotspots-in-Seoul/ENN039119