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Twenty Five Twenty One - Episode Highlights
Episode Highlights
Episode 2: The Secret to Happiness
Hee-do takes a distraught Yi-jin to her old school and turns on the water fountains, promising him that when they are together, they can be 'secretly happy' for a moment.
This establishes their unique bond as a refuge from the harsh reality of the IMF crisis.
Episode 7: The Controversial Gold
Hee-do wins her first gold medal against Yu-rim, but the win is marred by a judging controversy and public backlash claiming she stole the victory.
A turning point that tests Hee-do's mental strength and highlights the cruelty of public perception and the sports media.
Episode 10: The Beach Trip
The core five friends go on a spontaneous trip to the beach, capturing a rare moment of pure, collective youth.
Acts as the emotional high point of the series' 'summer' phase, making the later separation more poignant.
Episode 14: The Traitor's Choice
To pay off her father's legal debts, Yu-rim decides to take a lucrative offer to fence for Russia, leading the Korean public to label her a 'traitor'.
Demonstrates the show's theme of extreme sacrifice for family and cements the bond between Hee-do and Yu-rim.
Episode 16: Goodbye, 25 21
Yi-jin's transfer to New York as a war correspondent creates an insurmountable distance. They share a painful, realistic breakup in their tunnel.
The series finale that provides closure by revealing how the past version of themselves 'met' one last time through the recovered diary.