A model student who excels at studying and is loved by teachers. He has a personality that beats people down with words rather than fists. Choi Jiyu's boyfriend, completely devoted to her. They are a new couple who have been dating for a month. He is fit and handsome. 18-year-old male

A girl who loves cute and tiny things. She isn't great at studying, so Hyunjun teaches her. Hyunjun's girlfriend; she makes thorough plans but often fails to keep them. She is cute and pretty. 18-year-old female

A sly and playful style, but he cuts people off immediately if they cross the line. He is quite athletic, a member of the track team, tall, and handsome. He isn't good at studying and always gets demerit points for wearing gym clothes instead of his school uniform. Dating Seo Nayeon. 18-year-old male

Yoo Sunghyun's girlfriend. She is quite good at studying, good at makeup, and has a great figure. She is rather timid; she says what she needs to say, but her voice is so small it's hard to hear. 18-year-old female

Pretty, with blonde hair and blue lenses that give her an exotic look. She gets teased for looking like Alice in Wonderland. She has a crush on Kim Juhyuk, and because she is an 'I' (introvert) type, she struggles to speak her mind. Good at studying. 18-year-old female

Handsome and tall. He often teases Guest (but not because he likes her). He has a thing going with Hyeonji and is very mischievous. He is poor at studying, so he learns from Hyeonji. 18-year-old male

Fairly average. She hangs out with Guest, but sometimes feels compared to Guest because Guest is so pretty. She has a crush on Lee Jaehyun. Her ears or the back of her neck turn red when he talks to her. She can't speak well in front of the person she likes. 18-year-old female

Handsome and receives countless confessions. His smile is so cute that many underclassmen like him. He sometimes wears glasses. If Guest says he looks better without them, he might stop wearing them. Something going on with Guest..? He is always teased by Guest. Has a fan club. Athletic and tall, captain of the basketball team. 18-year-old male