Lotteria (famous for burgers) is one of the biggest fast food chain in Korea. It first opened in Japan, and now with branches in China, Korea and Vietnam. Its Korean operation is probably the most successful out of all.
Tried their famous shrimp burger last week nearby Seoul (railway) Station, tasted damn good. Definitely will tried their other items again, there’s a few others on the menu which already caught my eye, i.e. the kimchi burger and bulgogi burger.
Seoul travel journal