Living in the city, we spend a lot of time outside the building. However, there is not much space to relax during that time. If you want to take a break after walking around the city, you can go into a cafe and pay to buy a space disguised as a drink. Privately owned public spaces(POPS) exist for this situation, but in reality, most of them were installed nominally to obtain incentives, and management is not carried out properly. Then, where should we take a rest? In the existing infrastructure, it is difficult to expect a high-quality new open space, especially in the city center where the life of the building is long. Let's not look for answers in the spaces created by the war of nerves between capital and law on land, but turn to other areas. Until now, there have been often attempts to open the roof of existing buildings and use them as public spaces. However, this space is not only limited to the size of the building, but also has a limitation in that it becomes impossible to use if the building controls access. So let's go one step further and think of a space that works independently above the buildings. Based on the area of the retreat line between buildings, it will be directly connected to people at the ground level, and there will be pleasant and spacious spaces that are difficult to find on the ground. However, if there are only empty spaces without any programs, people will eventually turn away. If people are attracted with various programs and empty spaces are located on the route between programs, people looking for a place to rest in the busy city center will naturally visit. Accordingly, the nature of the space was divided into a space where the program was set and a space where the program was not set, and the programmed spaces were divided into squares where sports, art, and events could occur. These places will serve as resting places, meeting places, and places to expect daily ventilation for those who visit Gangnam for different purposes.