Underwater Meet-up is an interactive public installation displayed on an LED wall at Media Park in Seongbuk-gu, Seoul, South Korea. Designed to evoke an immersive aquatic environment, the experience invites audiences to engage with flowing layers of animated sea life and water particles that respond in real time to their movement. Developed using After Effects, Procreate, Unreal Engine, and Microsoft Kinect, the project is structured in six visual layers with particle generators interwoven throughout. As participants pass by, their motion triggers dynamic water effects—creating a playful, ever-shifting underwater meet-up between digital art and human presence.