Happy Udon is a restaurant near Seokchon Lake in Songpa-gu, Seoul, serving udon, donkatsu and rice bowls. The udon uses chewy noodles in a thick, deep broth, with gochu udon, cheese donkatsu and bibim udon on the menu. It is open 24 hours, and the large, clean space has seating that is easy for children and parking in front of the store. The bibim udon comes with plenty of vegetables, and the spicy ojingeo bokkeum is a good dish to have alongside the udon.