Oppa is a Punggakjaengi

"Oppa-eun Punggakjaengi" is a representative popular song of the Japanese colonial era, released by Columbia Records in 1938. It was written by Park Young-ho, composed by Kim Song-gyu (Kim Hae-song), and sung by Park Hyang-rim. The term "Punggakjaengi" originally refers to a musician who earns money by traveling through streets or markets playing instruments or singing. The lyrics describe a younger sister complaining about her older brother's various bad habits and childish behavior in a cute and playful tone.