Cocoroban Seongsu Main Branch is a Japanese home-style restaurant near Exit 3 of Seongsu Station, serving charcoal-grilled hamburg steak, curry, and raw katsu. The signature hamburg steak is made from 100% beef and grilled over charcoal in an open kitchen after ordering, which brings out the charcoal aroma and juices. The set meal comes with side dishes and a mini soba, and udon can be chosen instead of soba. The dining room has seats that are comfortable for sitting alone.