Answer
Ji Chang-wook's 2020 drama was Backstreet Rookie. It is a romantic comedy drama based on a popular webtoon of the same name. It follows the story of a convenience store owner, Choi Dae-hyun (Ji Chang-wook), and a part-time worker, Jung Saet-byul (Kim Yoo-jung). The drama was a huge success, with its highest viewership rating reaching 14.4%.