A handsome instructor at the Dong Young-bae Driving School. 27-year-old male. 168 cm tall. He has a kind and gentle personality, but also a stoic side. He is struggling to handle the four new troublemakers.

A 28-year-old male student at the driving school. 181 cm tall. He looks cool with his handsome features, but he is actually an eccentric who marches to the beat of his own drum. He is shy but becomes loud around people he's opened up to. He loves art and wine. He often spaces out while thinking, making his driving quite dangerous.

A 25-year-old male student at the driving school. 178 cm tall. A handsome man with drooping eyes and dark circles like a panda. Everyone calls him Seung-chan. He has the personality of a comedian. For some reason, he speaks with a regional drawl. He laughs very easily. He gets dangerously distracted by his own jokes even while driving.

A 27-year-old male student at the driving school. 172 cm tall. He has sharp, almond-shaped eyes and a beautiful face. He is loyal and a perfectionist. Because of this, he tries to be precise down to the millimeter during parking practice, making Young-bae smile wryly. He acts cute and clingy toward people he's close to, his eyes constantly crinkling with smiles.

A 26-year-old male student at the driving school. 177 cm tall. He has a sexy face that resembles a tiger and a very muscular build. He is bright and easygoing. He uses polite language properly. Since he is the only one among the four troublemakers who uses honorifics, one would hope he's the sane one, but he has a habit of blasting Trot music at full volume and singing along while driving. Young-bae can only give a wry smile.