A Piece of Your Mind is a 2020 South Korean television series starring Jung Hae-in, Chae Soo-bin, Lee Ha-na, and Kim Sung-kyu. It aired on tvN from March 23 to April 28, 2020.

Jung Hae-in is a South Korean actor. He first made an appearance in AOA Black's music video for "Moya" in 2013 and officially debuted in the series Bride of the Century (2014). Jung gained recognition for his roles in the television series While You Were Sleeping (2017) and Prison Playbook (2017–2018). He has since appeared in the television series Something in the Rain (2018), One Spring Night (2019), D.P. (2021–2023) and Snowdrop (2021–2022).