Girls' Generation member Sunny has recently become a part of Lee Soo Man's A20 Entertainment as an idol producer. A20 Entertainment confirmed the news on April 9, mentioning that Sunny has signed a contract with the company. She is currently being mentored by Yoo Young Jin to develop her skills as a producer. In addition to this role, Sunny is involved in various responsibilities at A20, including designing training programs and looking after the well-being of the trainees. She is actively engaged in different aspects of an idol group's production like content creation, styling, and choreography, as seen in a recent behind-the-scenes video.

Sunny was featured in a video called 'A20 Summer Training Camp Highlights' that showcased the trainees of A20 Entertainment. The video captured Sunny's interactions with the trainees at a recording studio in the US, highlighting her professionalism and dedication to her new role.