24Si Jayang Gamjatang is a restaurant in Jayang-dong near Konkuk University in Gwangjin-gu, Seoul, serving gamjatang and bone hangover soup. The bone hangover soup comes with large bones and potatoes, while the dried radish greens hangover soup is ordered separately. It is open from 8 a.m. to midnight, and food arrives in under a minute after ordering. The dishes are oily and can leave you feeling heavy after eating.