Twenty-Five Twenty-One is a 2022 South Korean television series directed by Jung Ji-hyun and starring Kim Tae-ri, Nam Joo-hyuk, Kim Ji-yeon, Choi Hyun-wook and Lee Joo-myung. The series depicts the romantic lives of five characters spanning from 1998 to 2021. It premiered on tvN on February 12, 2022, and aired every Saturday and Sunday at 21:10 for 16 episodes. It is available for streaming on Netflix.
The series was a commercial hit and became one of the highest-rated dramas in Korean cable television history.