The story, without the spoilers.
In 1998, South Korea is in the middle of a financial crisis. Na Hee-do is a high school fencer whose school team is disbanded, but she refuses to give up the sport she loves. Baek Yi-jin is a young man whose wealthy family has collapsed, so he works part-time jobs while trying to rebuild a future as a reporter. They meet by chance, become each other's loudest supporters, and grow up together through first love, fierce ambition and the hard truth that timing can be cruel. Twenty-Five Twenty-One is a coming-of-age story that understands youth as something bright and painful at once. The fencing scenes are thrilling, the friendship group is warm and funny, and Kim Tae-ri gives one of the most joyful performances in modern K-drama. It is also honest about how some loves do not survive growing up, which is exactly why the happy moments shine so brightly. Watch it for the sparkle, and stay for the ache underneath.
A little curiosity. A new favourite.
Start with the story, meet the cast, and make room for one more episode.