Cafe Onion is a trendy coffee shop located in the fashionable neighborhood of Seongsu-dong. The shop offers a range of coffee drinks, including pour-over, espresso, and cold brew, as well as a selection of pastries and sandwiches. The atmosphere is hip and modern, with industrial decor and plenty of natural light. Cafe Onion is a great place to hang out with friends or to get some work done while enjoying a delicious cup of coffee.