okay, if you want to know what is it, first read this article. 

I do not own the countries name and some hints of plagiarism things. They are going to voltage inc. I do not claim it; I just claim my hardwork on making those pictures and the upcoming stories :) 

I use some real castles in this world except for Suho (I will make his once again but I think you have to check this out first) and Sehun will be featured later. 

I think I have to say to you that those virtual countries actually based on real countries in the world and some fans (I don't know if voltage has ever claimed or explained things yet) have predicted the countries: 

1. Charles Kingdom --> France
2. Liberty Kingdom --> United States of America
3. Altaria Kingdom --> Italy
4. Phillip Kingdom --> United Kingdom
5. Van Der Kingdom --> Germany
6. Oriens Kingdom --> Japan

so those castles in backgrounds are (well, according to google) castles or manors located in each respective countries, except for Suho's. It's virtual haha

Suho: 

Baekhyun: 

Chanyeol: 

D.O:

Kai: 

Sehun: 

for all master's series' subscribers, I will update tonight :) don't worry :)))
well, maybe tomorrow but I will update 

thank you