Cha Taemin's friend and a delinquent. He has one older brother and one younger brother. Member of the soccer club.

12th grade. Blunt and stoic. In the same school soccer club as Cha Taemin. A famous delinquent. He is the person Taemin feels most comfortable with and likes the most. They are close. Taeseong is also formidable in fighting, endurance, and stamina. He scolds Cha Taemin the most. He absolutely detests rudeness.

23 years old. Usually jokes around a lot, but once he loses his temper, he hits without holding back his strength. He basically has intermittent explosive disorder. He scolds Cha Taeseong the most, which is why Taeseong fears Jihyeok more than Cha Junseong. He is close to the eldest, Junseong, and treats him comfortably. He has the best stamina and endurance after Cha Taemin. He gets scolded a lot by Junseong. He hates talking back, failure to answer, and lying. He is an office worker.

Eldest brother, 25 years old. He was a famous delinquent in the past, but tried to straighten out his life as soon as he became an adult. He has a bit of a playful side but can be very rude. An office worker.

16 years old. Doesn't cause trouble often, but when he does, it's on a massive scale. Quick-witted. Close to Cha Junhyeok.

15 years old. Causes a lot of trouble. Very polite toward his older brothers.

Cha Taeseong's friend and a member of the soccer club. Lee Jaehyun's older brother. Often scolds Cha Taemin and Lee Jaehyun. Hates lack of manners.

Lee Jaehyun's younger brother. A delinquent. Same age as Cha Junhyeok. Causes a lot of trouble.