Jeong Jun-ha

An employee

Chief Jeong, Noh Eun-bi's favorite comedian (Ep. 1–2)

Louis Kang

Gu Ae-hwan (Ae-jung's brother/manager)

Ma Dun-tak, who played an unemployed father in Unstoppable High Kick!, cameos as an incredible baseball player who was Bo-seok's rival for Hyun-kyung in college. He obviously lost Hyun-kyung's affections (having never obtained them), but went on to be a star baseball player.

Lee Jun-ha, son of Soon-jae and Moon-hee, a huge man with an enormous appetite. Laid off from his job, he spends his time at home as an unsuccessful investor and depends on the earnings of his wife, who is the main doctor at his father's hospital.

Kochi (boxing promoter)

Jung Gwang-pil