Twenty Five Twenty One — Season 1
The dreams of two young people are crushed by an overwhelming financial crisis in the 1990s. But when they reunite at the ages of 25 and 21, the spirited pair finds friendship and affection in times of adversity as they venture into adulthood together.
Episodes

E01 Episode 1
★ 7.5Feb 12, 2022 · 1h 16m
When the IMF financial crisis threatens to slash Na Hee-do's dreams, she sets out to get herself transferred to another school with a fencing program.

E02 Episode 2
★ 8.7Feb 13, 2022 · 1h 15m
Though taken aback by Ko Yu-rim's cold attitude, Hee-do gives it her best in their first face-off. More of Back Yi-jin's situation comes into focus.

E03 Episode 3
★ 8.0Feb 19, 2022 · 1h 11m
When a fortuitous opportunity presents itself, Hee-do begs her coach for extra training. An unanticipated visitor comes around hoping to see Yi-jin.

E04 Episode 4
★ 8.2Feb 20, 2022 · 1h 15m
In exchange for a favor, Hee-do carries out a daily errand for Moon Ji-woong. She happens across a drunk Yi-jin after he fails another job interview.

E05 Episode 5
★ 8.7Feb 26, 2022 · 1h 17m
Hee-do takes one giant leap closer to her dream. She's eager to tell Yi-jin the good news — but realizes he's disappeared without a trace.

E06 Episode 6
★ 8.7Feb 27, 2022 · 1h 15m
Tensions run high between Hee-do and Yu-rim before an important event. Yi-jin takes on a new assignment, and spots a familiar face in the crowd.

E07 Episode 7
★ 8.7Mar 5, 2022 · 1h 13m
A frustrating media narrative dampens a monumental moment for Hee-do. Yi-jin chases down the only person who may be able to set things right.

E08 Episode 8
★ 8.3Mar 6, 2022 · 1h 13m
Hee-do perceives a growing distance between herself and Yi-jin, even as he moves back into the neighborhood. Trouble at home adds to Yu-rim's stress.

E09 Episode 9
★ 9.2Mar 12, 2022 · 1h 13m
As Yu-rim's perspective on Hee-do shifts, so does her behavior. While Hee-do avoids seeing Yi-jin, he volunteers for a special documentary project.

E10 Episode 10
★ 9.0Mar 13, 2022 · 1h 11m
Under the guise of work, Yi-jin takes Hee-do and Yu-rim on a weekend getaway to the ocean — and agrees to let Ji Seung-wan and Ji-woong tag along.

E11 Episode 11
★ 8.7Mar 19, 2022 · 1h 17m
Hee-do grows upset when her career-obsessed mother fails to keep a promise. Yi-jin helps out Ji-woong's plans for a grand gesture at a music festival.

E12 Episode 12
★ 8.7Mar 20, 2022 · 1h 15m
Unable to hold back from putting an end to a teacher's abusive behavior, Seung-wan stands her ground. Hee-do and Yu-rim support a distraught teammate.

E13 Episode 13
★ 8.7Mar 26, 2022 · 1h 15m
Warnings about allowing his personal ties to affect his work weigh heavily on Yi-jin. The school fencing team enters their last competition together.

E14 Episode 14
★ 8.7Mar 27, 2022 · 1h 19m
Shouldering the burdens of a sudden misfortune in her family, Yu-rim arrives at a decision that places her in hot water with the public.

E15 Episode 15
★ 8.3Apr 2, 2022 · 1h 29m
Hee-do once again finds herself opposite her most formidable opponent. Yi-jin is busier than ever after transferring to another department.

E16 Episode 16
★ 8.3Apr 3, 2022 · 1h 30m
In an emotionally charged exchange, Hee-do and Yi-jin confront the state of their relationship. Hee-do accidentally leaves her diary on a bus.