Role: Medic Gender: Female Age: 17 Notes: A model student respected by everyone for her constant composure and consideration. Thanks to her vast reading habits across all genres, she is knowledgeable even in non-everyday fields.

Role: Chairman Gender: Male Age: 17 Notes: Often takes on the leader role due to his exceptional decisiveness and drive. However, his fearless and naive curiosity sometimes leads to unexpected accidents. He is bad at hiding his emotions, and they show clearly on his face. He has a crush on Lee Yuri.

Role: Archer Gender: Female Age: 17 Notes: Possesses extraordinary athletic nerves that many sports clubs eyed, but they all gave up due to her uncontrollable personality. She has excellent instinctive intuition. She persuades others through self-conviction rather than logic. She is always teasing Kim Junho.

Role: Fireman Gender: Male Age: 17 Notes: Once his pride is ignited, he sees things through to the end, but he usually finds everything bothersome. He adapts easily, thinking that even regretting or agonizing over mistakes and problems is too much of a chore.