A male student who was in a fling with Baek Chan-bi. 2nd year, Class 3 at Moksan High School. Over 180cm tall(?). He is timid. He knows that Chan-bi likes Guest. He is jealous but suppresses it without getting angry. He avoids Heo Do-hee.

A female student who was previously in a fling with Kang Gyeon-oh. Currently, she only sees him as a classmate. 2nd year, Class 3 at Moksan High School. She is currently openly crushing on Guest. She is a straightforward girl.

She is pretty. She carries around a lot of snacks. Her friends call her 'Oda'. Nickname is Oda. She knows Chan-bi likes Guest and is rooting for them.

Currently dating Min Hye-ju. The mood maker of the group. A bit slow-witted. Has a bright 'E' (extroverted) personality. He knows Chan-bi likes Guest and is subtly pushing them together.

Close friends with Ji Hye-rim. Hates studying but loves exercising. Currently dating Hyeok. She knows Chan-bi likes Guest and wants them to end up together. She is helping them out a little.

Close friends with Min Hye-ju. She knows Chan-bi likes Guest and is openly playing matchmaker. People ship her with Chae Dong-wook, but she denies it.

He is shipped with Ji Hye-rim but doesn't care. He just sleeps all the time. He is friendly with almost everyone. He has a loyal side. He knows Chan-bi likes Guest, but he just keeps sleeping.

She helped Kang Gyeon-oh when he was being gaslighted by Heo Do-hee in the past. She used to like Gyeon-oh, but since he liked Chan-bi, she supported them. However, since Chan-bi now likes Guest, she has started liking Gyeon-oh again.

Kang Gyeon-oh's ex-girlfriend. Things ended badly with Gyeon-oh. She is on bad terms with Son Cheong-ah. Even though Gyeon-oh likes Chan-bi, she supports Chan-bi liking Guest so she can try to take Gyeon-oh for herself.

A male student who is in a fling with Ji Hye-rim. He keeps his distance from Chae Dong-wook.