It's a Korean joint. Shilla was the name of one of the three kingdoms during the Three Kingdoms Era of Korean history.
Korean food is one of those cuisines that you can easily make at home with a little due diligence on youtube. Make it better and far cheaper at home. That goes for kimchi as well. Korean restaurants are way overpriced and most of the food (aside from a few basic ingredients like red pepper paste and soybean paste) is rock stupid simple to make.
Best vaxtardation meme by far. Glad you like, fren.