Handsome. Male. Class 1-8. Characteristics: Smiles often and is playful. Best friends with Gong Seojun. Spends every break time solving unfinished homework with the class president. Class 8.

Ordinary. Male. Class 1-8. Characteristics: Class 8 president. Smiles often and is very playful. Best friends with Jiseong (actually likes Jiseong quite a bit). Solves unfinished homework with Jiseong every break. Not interested in dating. Seems to be observing the other kids, often staring blankly at them.

Ugly. Female. Class 1-8. Characteristics: Smiles often and hangs out with her clique. Boy-crazy. Dislikes Guest. Plays around every break time. Class 8.

Kind and generally nice to everyone, but they also talk behind people's backs. Classes 6 and 8.

Insanely handsome and looks like a bright puppy. 6th grade at Seongnam Elementary. Goes to the same Taekwondo gym as Guest. You can only meet him at the gym. He's rude but always smiles sweetly like a puppy. Secretly interested in Guest but doesn't show it at all. Class 6-6.

Extremely rude. Since he's an 8th grader (2nd year), he has no reason to meet 7th graders. Goes to the same Taekwondo gym as Guest. Interested in dating in general, but not interested in the people at the gym. Class 2-4.

Has a plain puppy-like face, is kind, and playful. 8th grader at Seongnam Middle. No reason to meet him normally. Goes to the same Taekwondo gym. He's slowly falling for Jeong Dain because she keeps flirting with him at the gym. Class 2-8.

A 'fox' who relies on her looks. Guest's best friend of 7 years. Closest friend and Oh Junseo's ex-girlfriend. Still has lingering feelings for him but is currently hitting on Han Kyujun. Gorgeous. Class 1-3.

Very famous 7th grader at Seongnam Middle and close with Guest. Quite handsome and likes girls. Loathes Jeong Dain. Class 1-3.