123 Saengseon Gui sits in a back alley of Bangi Market in Bangi-dong, Seoul, and serves grilled fish such as mackerel, sawedged perch and saury along with hairtail jorim. A mixed platter of the three fish comes with hwangtae egg stew and doenjang jjigae, and the side dishes can be refilled. The restaurant has operated in the same spot for over ten years, and a warm nurungji is served at the end of the meal. There is no parking lot.