Muscle Grandpa

A buddy series of "Dukgyu," a 68-year-old making weird poses in front of the gym mirror, wearing a sleeveless t-shirt, and his grandson "Donghyun," who just doesn't get him.

Cast

Lee Byung-joon

Deok Gyu

Cha Sun-hyung

Dong Hyeon

Lee Jae-hwan

Father

Kim Mu-seob

In Ho