Spring of Youth () is a 2025 South Korean teen romance television series written by Kim Min-cheol, directed by Kim Sung-yong, and starring Ha Yoo-joon, Park Ji-hu, and Lee Seung-hyub. It aired on SBS TV from May 6, to July 2, 2025, every Wednesday at 22:40 (KST).
Drawing dismal average ratings of 0.9% despite airing on a terrestrial television network, Spring of Youth is notable for being belatedly revealed to have been written by Kim Soon-ok, who earned the reputation of being a "ratings queen" for controversial and highly provocative melodramas such as Temptation of Wife (2008–2009) and its spiritual successor Temptation of an Angel (2009), Jang Bo-ri is Here! (2014), My Daughter, Geum Sa-wol (2015–16), and The Penthouse: War in Life (2020–21).
Plot The series tells about a K-pop singer, Sa-gye, who is forced to attend a university campus. Forming a four-member co-ed band, he finds passionate love and music.
Cast Main Ha Yoo-joon as Sa-gye Moon Woo-jin as young Sa-gye A vocalist and guitarist of The Crown band. Park Ji-hu as Kim Bom Park So-yi as young Bom Lee Seung-hyub as Seo Tae-yang Nam Do-yoon as teen Tae-yang Park Sung-Hoon as young Tae-yang Seo Hye-won as Bae Gyu-ri Kim Seon-min as Gong Jin-gu
Supporting Jo Han-chul as Jo Sang-heon The president of Jo & Jo Company Han Yu-eun as Jo Ji-na Sang-heon's daughter and is an artist manager Cha Chung-hwa as Kim Ja Yeong Bom's aunt who take care of her after the death of her mother Kim Jong-tae as Seo Min-cheol The hospital director and Tae-yang's father who had high expectations on him and considered music to be nonsense Han Jin-hee as Yoon Seung-su Sa-gye's manager Kim Seo-ha as Kang Seok-hee President Jo's secretary
Special appearance Lee Won-hee as girl in the airport (ep. 10)
Production Development Director Kim Sung-yong, who previously co-directed My Dearest (2023), is in charge of directing, with Kim Min-cheol credited as the screenwriter. The series is produced by Studio S, FNC Story, and Monster Union.
A day after the final episode of Spring of Youth aired, Kim Min-cheol was belatedly revealed to be the pen name of Kim Soon-ok.
Casting Lee Seung-hyub reportedly confirmed his appearance and began filming on November 4, 2024. On December 6, Hankook Ilbo reported that Park Ji-hu was starring as the female lead. On December 12, Jo Han-chul had confirmed his appearance. The next day, Seo Hye-won was reportedly confirmed her appearance. On December 23, Ha Yoo-joon, Park, and Lee were reportedly confirmed their casting.
Release The series will air once a week every Wednesday at 22:40 (KST). However, its first and second episodes will air respectively on Tuesday, May 6, and Wednesday, May 7, at 22:40 (KST).
Ratings +Average TV viewership ratings (Nationwide)Original broadcast dateAverage audience share (Nielsen Korea)1May 6, 2025 2May 7, 2025 3May 14, 2025 4May 21, 20250.8% 5May 28, 20251.1% 6June 4, 20250.8% 7June 11, 20250.8% 8June 18, 20250.9% 9June 25, 20250.9% 10July 2, 20251.0% Average In the table above, the represent the lowest ratings and the represent the highest ratings.
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