TV series
Yoon Song Ah works as a marketer for a cosmetics brand. She enjoys her job and dreams of launching her own brand someday. Chae Hyun Seung is a fellow marketer who becomes attracted to Yoon Song Ah. He tries to develop a romantic relationship but Yoon Song Ah rebuffs his advances, not wishing to date younger men.
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Checked Jul 22, 2026
She Would Never Know is available to stream on Prime Video in United States. You can also buy it from Amazon. Use the direct links below to open the provider.
Yoon Song Ah works as a marketer for a cosmetics brand. She enjoys her job and dreams of launching her own brand someday. Chae Hyun Seung is a fellow marketer who becomes attracted to Yoon Song Ah. He tries to develop a romantic relationship but Yoon Song Ah rebuffs his advances, not wishing to date younger men.
Cast, crew and production details
Won Jin-ahYoon Song-ah
RowoonChae Hyun-seung
Lee Hyun-wookLee Jae-shin
Lee Ju-binLee Hyo-joo
Lee Kyu-hanLee Jae-woon
Wang Bit-naChae Ji-seung
Ha Yoon-kyungChae Yeon-seung
Kang Hye-jinKim Ga-young
JTBCSouth Korea
JTBC StudiosSouth KoreaWatch options above are for the show and may vary by season or episode.
Episode 1
Chae Hyeon-Seung hints at wanting to be more than co-workers with Yoon Song-a, who intends to keep it professional. Then, he finds out she's taken.
Guest stars Lee Rang-seo, Kim Seo-ha
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Episode 2
Unable to watch from the sidelines any longer, Hyeon-seung takes Song-a to a dress shop, where she finds out why her office romance had to be a secret.
Guest stars Lee Rang-seo
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Episode 3
While preparing for an offsite event, the tension between Song-a and Hyeon-seung grows. Lee Jae-un learns that the woman of his dreams is unavailable.
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Episode 4
Lee Jae-shin gives Hyeon-seung a hard time at work and tries to convince Song-a to come back to him, but his attempts only seem to backfire.
Guest stars Yang Hee-won
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Episode 5
Song-a learns that Jae-shin signed her up for an opportunity in Europe. Hyeon-seung is assigned to another supervisor.
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Episode 6
Even after declining the offer to work in Europe, Song-a remains torn on her decision. When a model is a no-show at a VIP event, Hyeon-seung steps in.
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Episode 7
Song-a and Hyeon-seung pull an all-nighter at work together, but end up becoming more awkward than ever. News of Jae-shin’s wedding goes public.
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Episode 8
Hoping to stay close to Song-a, Hyeon-seung chooses to bottle up his feelings for her. Jae-shin's father meets Lee Hyo-ju with his usual demands.
Guest stars Lee Chang-In
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Episode 9
Hyeon-seung comes down with a fever after an important presentation. Song-a's mom makes an unannounced visit and demands more of her daughter's time.
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Episode 10
Song-a goes on leave to care for her mother. The brand manager of another cosmetics company tries to sway Hyeon-seung to his side.
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Episode 11
When another brand copies Hyeon-seung's idea, Jae-un suggests launching the same product. Song-a proposes a plan that could set them apart.
Guest stars Kim Mi-kyeong
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Episode 12
Jae-un and Song-a clear the air, but fail to stop the rumors from spreading. A beauty influencer posts a biting review of a product for views.
Guest stars Han Seung-yoon
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Episode 13
With a manager, Song-a opens up about career concerns she's unable to discuss with Hyeon-seung. She receives another chance to go to Europe.
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Episode 14
Keeping busy with upcoming changes at work, Song-a puts her love life on hold. Hyeon-seung gets tied up with an urgent quality control issue.
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Episode 15
Song-a returns to her old team and works alongside Hyeon-seung again. While his cold demeanor bothers her, she understands why it has to be this way.
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Episode 16
Song-a goes all out to win Hyeon-seung back, but he fears they're repeating the same mistake again. Chae Ji-seung offers a word of advice.
Guest stars Ma Hyun-ji
Where to watch She Would Never KnowEpisode information updated Jul 22, 2026
