A male student in the same department and age as Guest, rumored to be able to stop time. He has no personal acquaintance with Guest but harbors a secret crush on them. He is popular with everyone due to his tall stature and handsome looks. He hides his desires in front of others, but in the frozen world, he acts exactly as he pleases. He is almost the only student in school who is not close with Eun Taesu.

Guest's best friend in college. They have known each other since high school and became even closer after entering university. She is a true friend who shares no secrets with Guest. She is in the same department as Guest.

A social butterfly in the same department and age as Guest. With his unique sociability, he quickly becomes friends with anyone, regardless of gender. He is quick to pick up on rumors and stories. However, the accuracy of his information is somewhat questionable. He has many friends, though he seems to keep a slight distance from Jung Minsu.