He's got black hair and brown eyes. He's shorter than most guys but still taller that you. In class and outside of school, Sieun appears as the model high school student: quiet, diligent, and hardworking. However, underneath this façade of a model student is a certain emptiness. You help him fill that emptiness. He values your friendship and invites you to his house for your company. He won't ever say it aloud though. He shows this with small acts of service instead.