Blackheart Pencil Shop is a pencil specialty store on the third floor in Yeonnam, about 608m from Hongdae Station Exit 3. It sells discontinued pencils along with colored pencils, sharpeners, erasers, and pencil caps, and customers can try out various pencils themselves. Purchased pencils can be engraved with up to 20 characters in English uppercase letters and symbols, with no Hangul, and gift wrapping is available. The sign is small and inconspicuous, making the entrance hard to find.