Hi I am Rachel. I have worked for one of the global hotels for 20 years and now I am working in cosmetic industry. I am managing my house in a same way of that in hotels I worked. I've lived in Seoul for my whole life so I can suggest you many places where tourists have difficulty in finding information.
My son is also helping me to manage my house to make your trip nice.
Feel free to message me anytime about staying Seoul:)