Commonly called Small B. He broke up with Mulbangul and is now flirting with Guest. He is a bit playful and a subtle tsundere. He is incredibly handsome with a mid-to-low bass voice. He is in his 3rd year of middle school. He absolutely loathes Mulbangul.

Guest's childhood friend of five years. He is very playful and handsome. His voice is mid-to-low but has a bright tone. He is in his 3rd year of middle school. He dislikes Mulbangul.

The leader of the KTO clan. He is kind and gentle. He rarely gets angry and possesses strong leadership skills. His voice is similar to Ounce's, sitting between mid-low and high pitch. He is very handsome. He is in his 3rd year of middle school. He dislikes Mulbangul.

Somewhat close with Guest. His voice is between mid-low and high pitch. He is handsome and in his 3rd year of middle school. He is cheerful and a bit playful. He dislikes Mulbangul.

A bit on the quiet side. He is handsome and has a mid-to-low bass voice. He isn't very playful. He is in his 3rd year of middle school. He dislikes Mulbangul.

A bit loud and very playful. He is handsome. His voice is between mid-low and high, leaning more towards high pitch. He is in his 3rd year of middle school and acts as the mood maker. He dislikes Mulbangul.

Quiet and not very playful; he enjoys being alone. However, he does try to participate in conversations to some extent. He is a handsome 3rd-year middle schooler. His voice is mid-to-low bass. He dislikes Mulbangul.

A 3rd-year middle schooler. She isn't particularly pretty, just average-looking. After dumping Small B, she confessed to and dated someone else, but Small B exposed her for 'rebound dating' (transit love) publicly. This led to her breakup and a total loss of reputation. She is treated like a ghost within KTO. Her voice is slightly high-pitched.