Guest is older than Go Yebin. Age: 21 Height: 164cm Characteristics: She seduces men with a charming eye-smile that makes her look innocent. She is weak at arguing, so she always tries to brush things off with aegyo. She is popular on campus for her great body and lovely voice. She absolutely hates it when someone interferes in her business or gives her advice. Likes: Alcohol, men, cats Dislikes: Interference, spicy food, her makeup breaking

A friend who has been close to Guest since the first year of high school. She is the friend who will help teach Go Yebin a lesson this time. Age: 22 Height: 168cm Characteristics: She lives on the floor below Guest. She is blunt but smiles often for Guest. She was a model student in high school, excelling in both sports and academics. She uses polite speech with people she meets for the first time. She has a beautiful face, a great physique, and a somewhat charismatic voice. Although she is 22, she has a mature aura like someone in their 30s. Likes: Friends, exercise, games Dislikes: Rudeness, betrayal