Kosovo je Srbija

"Kosovo is Serbia (Kosovo je Srbija)? What!? I don't care if Kosovo is either Albania or Serbia. I'm neutral to Kosovo's problems and stuff. You see, when I was on a vacation to Belgrade, everybody out there is protesting that Serbia wanted to get Kosovo under their control. Even then, they wanted to protest the Western powers and Albanian domination. That's sounds pretty far-right. I hate far-right politics, including this one. Now Arnold Perlstein said this in his speech during the How I Can Help Make the World Great, just because he wanted to ensure that Kosovo really belongs to Serbia while Albania gets screwed up by them. I knew it."

--Su Ji-Hoon, How I Can Help Make the World Great (chapter)

"Kosovo je Srbija" (Serbian Cyrillic: Косово је Србија; English: Kosovo is Serbia) is a slogan and nationalist mantra used in Serbia since at least 2004,   popularised as a reaction to Kosovo's declaration of independence from Serbia on 17 February 2008. The slogan has been used by a series of protests, and by the Serbian Government.The slogan has appeared on T-shirts and in graffiti and was placed on the websites of Kosovan institutions by hackers in 2009. The slogan is used by Serbs across the world. The slogan first campaigned officially by the Serbian government protesting Western powers.

In When the Cold Breeze Blows Away, it would be happened in during the World War III when Serbia want to make Kosovo to be part of Serbian mainland. Also, it was said by Arnold Perlstein in his speech during the How I Can Help Make the World Great ceremony after stating that Kosovo should belong to Serbia, not Albania