Study Group (TV series)

Did You Know?

• Hwang Min-hyun was reportedly cast on August 10, 2023, according to his agency Pledis Entertainment.
• Yoon Hyun-suk, formerly of boy group CIX, joined season 2.

Cast and characters

Hwang Min-hyun portrays Yoon Ga-min, a first-year student at Yusung Technical High School who excels at fighting but struggles academically, forming a study group to pursue university admission. Choi Seung-hoon and Jang Sun-yool play younger versions of Ga-min. Han Ji-eun appears as Lee Han-kyung, a temporary teacher who supports the study group. Cha Woo-min plays Pi Han-wool, a model second-year student.

Lee Jong-hyun plays Kim Se-hyun, Ga-min's classmate who joins the study group, with Shin Seo-woo as young Se-hyun. Shin Su-hyun plays Lee Ji-woo, a first-year student and twin sister of Hyun-woo, who is part of the group; Lee Nam-gyeong plays young Ji-woo. Yoon Sang-jeong plays Choi Hee-won, Ji-woo's best friend who also joins. Gong Do-yu plays Lee Jun, a self-proclaimed member who joins because of Ga-min's fighting ability; Song Seung-hwan and Kang Ji-yong play teen and young Jun. For season 2, Jeon So-young joins as Jang Min-hee, a first-year at Cheongma High School; Kim Su-gyeom as Choi Moo-gyu, a third-year at Yusung; and Kwon Sang-woo as Jeon Young-ha, Ga-min's uncle who trained him in fighting.

Yoon Hyun-suk joins as Ji Young-hyun. Additional cast includes Hong Min-gi as Park Geon-yeop, a first-year seeking his mother's murderer; Baek Seo-hoo as Ma Min-hwan, a second-year and associate of Han-wool; Park Yoon-ho as Lee Hyun-woo, Ga-min's classmate and Ji-woo's twin brother; Lee Kwang-hee as Jung Do-hoon; Joo Yeon-woo as Kim Sun-chul, a third-year leader of the Yeonseo Three Chuls; Kwon Hyung-seok as Lee Dae-chul; Han Jung-hun as Park Min-chul; and Lim Ji-sub as Anti.

Production

The series is co-directed by Lee Jang-hoon and Yoo Beom-sang, with writing by Eom Seon-ho and Oh Bo-hyun. Studio Dragon planned the project, and Ylab Plex produced it. On August 10, 2023, Hwang Min-hyun was reportedly cast, and TVING revealed the main cast on September 20. A second season was confirmed to be in early planning stages on May 12, 2025. Hwang Min-hyun, Shin Su-hyun, Yoon Sang-jeong, and Gong Do-yu were confirmed to return for season 2 in January 2026, with Jeon So-young, Kim Su-gyeom, and Kwon Sang-woo joining. Yoon Hyun-suk was confirmed for season 2 on July 14, 2026, with filming in progress.