Ikki Roll Katsu Garosugil Main Branch is a tonkatsu restaurant near Sinsa Station in Garosugil that serves roll katsu and Korean-style Western tonkatsu. The sweet potato cheese tonkatsu is topped with sweet potato mousse and cheese while staying crisp, and the tonkatsu and sauce are made in-house. A self-service bar offers refills of broccoli soup, black rice, soup, danmuji, and kimchi. The restaurant is located underground, so look around for the entrance.