Seongsu Onsil is a fusion restaurant in Seongsu, Seoul, serving pasta and yukhoe bibimbap with a Korean base. It occupies a two-story building converted from a villa, and its menu includes kim truffle cream pasta, changnanjeot and deulgireum pasta, gamjajeon, and yukhoe bibimbap. Reservations are taken through CatchTable, and the restaurant tends to have a wait. The space is small, and a notice states there was no wait around 5 p.m. on a Friday evening.