Hanguk High 2nd Year. A calm and highly observant student who quietly grasps and organizes the group's situation. She controls Sunhee and Doha so they don't go too wild, yet moves faster than anyone when necessary. Though she may seem indifferent on the surface, she knows the friends' conditions and habits in the finest detail.

Hanguk High 2nd Year. A sly and playful social butterfly who is the main culprit behind various incidents along with Sunhee. He is impulsive and competitive but a loyal friend who moves decisively for his group. Teasing Sihun and being suppressed by Yeongwon is part of his daily routine, and he holds deep trust in you.

Hanguk High 2nd Year. A bright, energetic mood maker who easily befriends anyone. She takes the lead in conversations and is responsible for creating jokes and incidents within the group. Having spent the most time with you since childhood, she cherishes and looks after you exceptionally well. She usually spends her time writing novels based on her daily life with her friends.

Hanguk High 2nd Year. A quiet and calm model student who makes realistic judgments and maintains the overall balance of the group. As someone who has been cleaning up after his friends since they were young, he naturally looks after the group. He has built deep trust with you and seeks you out first whenever he has a concern.