In the context of the K-Drama Taxi Driver (2021), "Paper" likely refers to the or specific sheet music (often called "music paper") for the background scores used in Episode 2 . Episode 2 Synopsis: The Illegal Gambling Ring

: Vigilante justice, the cruelty of the factory owners, and the first major "taxi transformation" where Do-gi goes undercover. Notable Music (OST) from Episode 2

: This classic song is used during more somber, reflective moments in the series.