Girlfriend's Sister
여친 언니
“My wife's senior.. and my boyfriend...”
We checked 8 streaming services in India on 06 Jun 2026 at 02:45 IST
About
Minsu at home alone after four hot nights of work. Hye-rim's wife comes to her house with her sister, Su-bin. Until late at night, the three people drink together, and Su-bin sleeps in the house. The next day, Su-bin loves Min-su, and when Hye-rim goes to work, she seduces Min-su and shares the affair. That evening, Minsu came home after work and Su-bin's boyfriend Hyun-soo came. At the drinking party, Su-bin's couple continues to talk sexually, and Min-su is just uncomfortable. However, his wife, Hye-rim, falls in love with a dirty story. In the end, their conversation develops even to swapping...
Cast
Where does Girlfriend's Sister rank today?
Girlfriend's Sister is #6958 on the CineFlixo Daily Streaming Charts today.
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Watch Girlfriend's Sister Online Free in HD
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About Girlfriend's Sister
“My wife's senior.. and my boyfriend...”
Minsu at home alone after four hot nights of work. Hye-rim's wife comes to her house with her sister, Su-bin. Until late at night, the three people drink together, and Su-bin sleeps in the house. The next day, Su-bin loves Min-su, and when Hye-rim goes to work, she seduces Min-su and shares the affair. That evening, Minsu came home after work and Su-bin's boyfriend Hyun-soo came. At the drinking party, Su-bin's couple continues to talk sexually, and Min-su is just uncomfortable. However, his wife, Hye-rim, falls in love with a dirty story. In the end, their conversation develops even to swapping... Running 70 minutes.
Girlfriend's Sister Cast and Characters
The cast features Kim Hee-jeong (as Hye-rim), Yoon Da-hyeon (as Su-bin), Sang Woo (as Min-su), and Seok-hwan (as Hyeon-su). Their performances are a major reason Girlfriend's Sister has built such a passionate audience.
Where to Watch Girlfriend's Sister Online
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▶ Watch Girlfriend's Sister NowWhy People Are Watching Girlfriend's Sister
Girlfriend's Sister flies under the radar but it deserves your attention. What makes it work is chemistry between leads that actually feels real. If you enjoy Coreano storytelling that doesn't follow the same tired beats, this is the kind of film you'll end up recommending to friends.
Frequently Asked Questions about Girlfriend's Sister
Where can I watch Girlfriend's Sister online for free?
You can watch Girlfriend's Sister online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.
How long is Girlfriend's Sister?
Girlfriend's Sister runs for 70 minutes (about 1.2 hour).
Is Girlfriend's Sister good? What's the rating?
Girlfriend's Sister holds a 6.0/10 rating based on 0 reviews — a solid pick if the genre interests you.
Who is in the cast of Girlfriend's Sister?
The main cast includes Kim Hee-jeong, Yoon Da-hyeon, Sang Woo, and Seok-hwan.
Is Girlfriend's Sister available in Coreano?
Yes — Girlfriend's Sister was originally produced in Coreano and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.
When was Girlfriend's Sister released?
Girlfriend's Sister was released in 2018.
Do I need an account to watch Girlfriend's Sister on CineFlixo?
No. CineFlixo is free and you can watch Girlfriend's Sister without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.
Similar Movies You Might Like
If you enjoyed Girlfriend's Sister, check out Unfinished Book, Unfinished Love, Lie I Love Sex 2, Scandal: Lawful Entry, Etchi na taion: Hakui midare nuki, and Kannou Tekunikku Kuchibiru Shita Yubi.
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Frequently Asked Questions
Common questions about Girlfriend's Sister
Where can I watch Girlfriend's Sister for free?
You can watch Girlfriend's Sister (2018) online for free on CineFlixo. Just click "Watch Free" on this page to start streaming instantly — no account, subscription, or downloads required.
What is Girlfriend's Sister about?
Girlfriend's Sister is a Romance film. Minsu at home alone after four hot nights of work. Hye-rim's wife comes to her house with her sister, Su-bin. Until late at night, the three people drink together, and Su-bin sleeps in the house. The next day, Su-bin loves Min-su, and when Hye-rim goes to work, she seduces Min-su and shares the affair. That evening, Minsu came home after work and Su-bin's boyfriend Hyun-soo came. At the drinking party, Su-bin's couple continues to talk sexually, and Min-su is just uncomfortable. However, his wife, Hye-rim, falls in love with a dirty story. In the end, their conversation develops even to swapping...
When was Girlfriend's Sister released?
Girlfriend's Sister was released on October 4, 2018. It has a runtime of 1h 10m.
Who stars in Girlfriend's Sister?
Girlfriend's Sister stars Kim Hee-jeong, Yoon Da-hyeon, Sang Woo and Seok-hwan. The full cast list is available in the Cast section above.
Is Girlfriend's Sister available in HD?
Yes, Girlfriend's Sister is available to stream in high definition (HD) on CineFlixo. Our players automatically deliver the best quality your connection supports — no extra setup needed.