Olive Young N Seongsu is a large multi-brand beauty store spanning from the 1st to 4th floor, where you can experience and purchase various beauty products on each level. Unlike regular stores, it features a separate luxury line and perfume specialty corner, and is equipped with sink facilities for product testing, allowing you to check the actual feel of products firsthand. In particular, the makeup experience space staffed by professional beauty advisors offers one-on-one customized makeup lessons and home care lessons, and provides a detailed list of products used, making it easy to apply directly to daily life. A limited 10% discount is also offered on the day of the experience, allowing you to purchase products you like at reasonable prices, and there's so much to see that two hours can easily pass while browsing floor by floor. If you want to experience the latest trends in K-beauty at a glance, a visit is highly recommended.