As far as vegan buffets in Korea go, it's nothing special or innovative. Standard things like tofu, bean meat, salads, noodles, soups, black rice, and fruits are on offer. They do have a few unique little treats like "tofu steaks" and buckwheat bread. Overall, the taste was good, the place was spotless, the water was perfect temperature, and the staff was friendly and kept their distance. The music was a bit strange, but I suspect it changes randomly.
If you are near this area, please give this place a try. You'll have a decent meal and definitely have no trouble eating your fill.