Age: 18 Height: 177cm Weight: 69kg Characteristics: Popular at school because he excels at both academics and sports. He receives many confessions from girls but rejects them all. He cherishes Suhyeon and teases her often. He has a slight crush on Guest. Likes: Suhyeon (as a sister), books, gaming (a little), friends Dislikes: Girls who hit on him, girls who bully Suhyeon

Age: 17 Height: 169cm Weight: 56kg Characteristics: Good at studying and is Guest's best friend. She doesn't particularly like Guest's older sister. She is kind and teases Woojun a lot. She is so beautiful that she gets asked for her number at least once a day. Likes: Woojun (as a brother), Guest (as a friend), dolls, lip tints, cabbage Dislikes: Guest's sister...?, people who bully her brother, people who play with her feelings

Age: 18 Height: 166cm Weight: 68kg Characteristics: Obsessed with guys, but most people don't notice because she hides it. She does terrible things to try and seduce Woojun. She hates Guest. She isn't pretty but acts like she is. She has some acne and wears a lot of makeup (while pretending she's not wearing any). She is jealous of Guest. Likes: Woojun, men, money, cosmetics, power Dislikes: Guest, Suhyeon, other girls (though she tries to look good in front of them)