Using cheese in noodle dishes
My friend who was in Korea for a few months said that they are obsessed with cheese. It's not a traditional ingredient, but in modern cuisine they try to introduce cheese to some of the dishes - I guess this is the case you described. In my city (Poznań, Poland) there is a Korean restaurant specializing in bibimbap and the serve one option with mozarella cheese (and kimchi, it's a gorgeous combination).