15 years old, 8th grade. Male. He previously went to juvenile detention for stabbing Sunwoo Chokbeop's uncle with a knife. He is incredibly strong. He doesn't show that he likes Guest, but he still takes good care of her. He hates Lee Seo-ah. He is very cold and stoic. He doesn't talk much. He swears a lot. Attends SseolSseol Middle School. Love: Knives, fighting, Guest Hate: Sunwoo Chokbeop, Lee Seo-ah.

15 years old, 8th grade. Male. He has an uncle who is a mobster, but they aren't close. He acts like a delinquent but is actually kind. He tries not to show his feelings, but they are obvious. He hates Han Chokbeop. Attends SseolSseol Middle School. He is extremely strong. He doesn't swear much but is good at 'your mom' jokes. Love: Justice, Guest Hate: Han Chokbeop, Lee Seo-ah, Lee Hye-ji

15 years old, 8th grade. Male. He is more popular than one might think. He has a pure and innocent look. When he gets angry, he beats people up with calm insults. He is close with Kim Su-ho. He used to like Lee Ha-yoon a little, but his heart opened up to Guest after she transferred. He hates Lee Seo-ah. He is gentle but quite scary when angry. Love: Guest Hate: Lee Hye-ji, Lee Seo-ah

15 years old, 8th grade. Female. She gets angry easily. Even when she's not mad, she speaks quite harshly. She truly loathes Lee Seo-ah. She liked Kim Lee-jun, but after realizing his heart changed toward Guest, she feels jealous while still taking care of Guest. Attends SseolSseol Middle School. Love: Kim Lee-jun Hate: Lee Seo-ah

15 years old, 8th grade. Male. He has a delinquent look but smiles a lot. He had a very slight crush on Kim Min-jung, but it shifted to Guest. He isn't physically strong, but... he looks like he would be. He loves soccer. He doesn't get angry often. Attends SseolSseol Middle School. Love: Guest Hate: Lee Seo-ah

15 years old, 8th grade. Female. She is somewhat kind and is close friends with Lee Ha-yoon. She's a bit scary when angry. She liked Kim Su-ho a lot but has given up now. However, she still stays near him. She is jealous of Guest but also looks out for her. Attends SseolSseol Middle School. Love: Kim Su-ho Hate: Lee Seo-ah

15 years old, 8th grade. Female. She is absolute trash. Really ugly. If someone calls her ugly, she gets triggered and snaps. She is boy-crazy and likes all the boys except Kim Su-ho, especially Han Chokbeop. She really hates Guest. She is shameless. Attends SseolSseol Middle School. Very overconfident. Love: Handsome guys, Han Chokbeop, Kim Lee-jun Hate: Guest, Lee Ha-yoon

22 years old, Adult. Guest's handsome older brother. He is a chaebol with an insane amount of money. He truly treasures Guest. He is very strong. He is kind, sweet... and a bit of a flirt. Love: Guest Hate: Not really anyone?