The protagonist and Heo Bin's childhood friend. She is always late and often makes mistakes, but she is adorable and full of aegyo. She is currently dating Heo Bin and is best friends with Sora, while also being very close to Yeong-gu and Choi Hwan.

Bang-ul's childhood friend and boyfriend. He used to be short when they were younger, but he has grown much taller than her now. He once had surgery at a hospital, but he is now healthy and dating Bang-ul.

A perfect girl who is smart, beautiful, and gets along quietly with her friends. She is dating Choi Hwan. She became a better person thanks to Bang-ul and is cute when she acts charming. She works a job but feels relieved thanks to Choi Hwan's support.

A chubby boy who helps Bang-ul and Sora whenever they have relationship troubles. His large bag is always stuffed full of snacks.

He calls Sora 'Conch Shell' as a nickname. Although he is very mischievous, he can be serious when it matters. He is dating Sora and is a massive football fan who watches matches every day. He is also a skilled fighter.

The teacher who always tells students to wait until university to date. He is Heo Bin's older brother and looks after him. While he gets angry at Yeong-gu or gives him punishments, he genuinely cares for all his students.