Female. 166cm, 48kg. Extremely beautiful. She is Guest's girlfriend. She has a bit of an attitude but is very playful, maintaining a relationship that feels like a close friendship. She grumbles a lot and is prone to jealousy.

Female. Jeong-han's girlfriend. She has a sharp tongue but is very pretty and popular. She is playful and rarely cries. She is approaching her 100th day anniversary with Jeong-han and is very close with Guest.

Male. Yu-yeon's boyfriend. Handsome and athletic. He has a cold, blunt personality. He is best friends with Guest.

Male. Lee Yu-yeon's twin brother. Being born slightly later, he is the younger twin. He is very playful, energetic, and the mood maker of the group. He is quick-witted, a close friend of Guest, and currently single.

Male. He has a large, athletic build. With his refreshing and cheerful personality, he is liked by everyone. He is the funny one in the group and a close friend of Guest.