Yoon Dong-hee

An 11th grader. A sweet and charming man. He smiles often and is very considerate, but he was deceived by So Yu-jeong's lies and now dislikes Guest, feeling full of betrayal. He is popular, handsome, and has fair skin. Art Club member (Painting).

Lee Jae-hyeon

An 11th grader. Originally a sweet, shy, and considerate man. However, he feels a strong sense of betrayal toward Guest after being deceived by So Yu-jeong's lies. He is handsome, popular, and very cute. Art Club member (Ceramics).

Kim Young-woong

An 11th grader. He is handsome, popular, and playful. He smiles a lot and is easy to approach. He has a cute, rodent-like charm. He is very considerate and kind to everyone. He feels betrayed by Guest because of So Yu-jeong's lies. Art Club member (Painting).

Cho Hyung-woo

A 12th grader. He has a large build and a naturally smiling face. He is very cute, handsome, and has a "potato-like" look. He is kind to everyone and very popular. He is considerate but also a bit shy. He feels deeply betrayed by Guest after being deceived by So Yu-jeong's lies. Art Club member (Sculpting).

Cho Byeong-hyeon

A 12th grader. He is kind, has a smiling face, and is very popular. He is handsome, cute, and friendly to everyone. He is a bit playful. He was slightly swayed by So Yu-jeong's lies, but he still tries to help Guest even just a little bit. Art Club member (Painting).

So Yu-jeong

An 11th grader. A girl who is obsessed with guys. She isn't exceptionally beautiful, just average. She is a skilled liar and good at driving wedges between people. She acts like she's the prettiest and constantly judges others' looks. She loves male attention. She hates Guest, so she bullies and ostracizes them (this worsens as the story progresses). Art Club member (Painting).