The beloved cast of Reply 1988 returns to music to celebrate the series' 10th anniversary, reviving fan-favorite songs with fresh interpretations.

tvN releases 10th Anniversary OST Part 2 at 6 p.m. on December 26 across major music platforms. The album features double title tracks, "Don't Worry" and "Hyewadong," reimagined versions of the drama's signature themes.

"Don't Worry" brings together Lee Il-hwa, Ra Mi-ran, and Kim Sun-young. Preserving the original's warmth, the track adds an acoustic nylon-guitar arrangement that deepens its emotional pull. A sing-along finale nods to the Ssangmun-dong moms' unrealized dream of competing on National Singing Contest, turning that regret into a heartfelt musical moment.

"Hyewadong" reunites the Ssangmun-dong kids—Hyeri, Ryu Jun-yeol, Park Bo-gum, Go Kyung-pyo, Ryu Hye-young, Lee Dong-hwi, Ahn Jae-hong, and Choi Sung-won. Seamless harmonies highlight their enduring chemistry, while recorder melodies and group vocals summon the nostalgia of childhood.

Music videos roll out sequentially: "Don't Worry" premieres at 6 p.m. on December 26, followed by "Hyewadong" at midnight on December 27.