

Season 1
When we were 18, we first called each other by name. At 21, we fell in love.
Synopsis
Twenty Five Twenty One (스물다섯 스물하나, 2022), Season 1 is a 16-episode Korean coming-of-age drama you can watch online on iFILM. Set against the late-1990s financial crisis, the season lets that very crash break two young people's plans before it quietly pushes them toward each other.
Na Hee-do dreams of fencing for real, but her school cuts the program, so she transfers to train alongside the national team's rising star. Back Yi-jin loses the comfortable life he knew when his family goes bankrupt, and takes any job that helps him start over. They meet by chance, and out of bickering, defeats and late-night talks grows something neither rushes to name. Around them the season tracks rivalry on the strip, the bond between five friends, and the cost of chasing a dream at the wrong moment.
This tvN hit, led by Kim Tae-ri and Nam Joo-hyuk, wins on tone rather than twists — warm, nostalgic, and now and then genuinely aching. If you love stories about first love and being young, this one rewards you. Stream Twenty Five Twenty One Season 1 online on iFILM.
16 episodes
S1·E1Episode 1
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.
S1·E2Episode 2
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.
S1·E3Episode 3
When a fortuitous opportunity presents itself, Hee-do begs her coach for extra training. An unanticipated visitor comes around hoping to see Yi-jin.
S1·E4Episode 4
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.
S1·E5Episode 5
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.
S1·E6Episode 6
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.
S1·E7Episode 7
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.
S1·E8Episode 8
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.
S1·E9Episode 9
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.
S1·E10Episode 10
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.
S1·E11Episode 11
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.
S1·E12Episode 12
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.
S1·E13Episode 13
Warnings about allowing his personal ties to affect his work weigh heavily on Yi-jin. The school fencing team enters their last competition together.
S1·E14Episode 14
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.
S1·E15Episode 15
Hee-do once again finds herself opposite her most formidable opponent. Yi-jin is busier than ever after transferring to another department.
S1·E16Episode 16
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.
1 seasons
Starring



















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