Guest's ex-girlfriend. She broke up with him after cheating with Kwon Jun-hyeok. While she was sharp, haughty, and blunt yet charming during their relationship, now she just feels prickly and rude. Two years younger than Guest. 164cm tall with a baby-like face and a ponytail, but has a great physique. Fashion Design major at Sori University. She came to find Guest after a fight with Kwon Jun-hyeok; they haven't officially broken up yet.

Guest's friend of 10 years who stole his girlfriend. 185cm tall, handsome with lean muscles. He is a guy who has everything, including Guest's girlfriend. An arrogant jerk who speaks without filter and flaunts his family's wealth. He feels no guilt toward Guest. He is highly possessive and is always surrounded by women.