Once in a Summer poster
Where to stream

Once in a Summer

6.820062h 1mMovieDramaRomance

An assistant to a TV producer, eager to stay off his bad side, promises to convince her former professor, a famous but reclusive academic, to appear on their show, which helps locate long-lost persons. Who does grey-haired Professor Yun…

DirectorJoh Keun-shik
WritersKim Eun-hee·Lee Suk-yeon
ProducersBang Chu-seong·Kim Hyun-jung

Where to watch

Amazon Prime VideoAmazon Prime VideoAmazon Prime Video with AdsAmazon Prime Video with AdsHooplaHooplaThe Roku ChannelThe Roku ChannelRakuten VikiRakuten VikiAmazon Prime Video Free with AdsAmazon Prime Video Free with AdsTubi TVTubi TVAmazon MX PlayerAmazon MX Player
Availability shown for United States · rights vary by country

Cast · Directed by Joh Keun-shik

LBLee Byung-hun
Lee Byung-hun
Yun Suk-young
SASoo Ae
Soo Ae
Seo Jung-in
LSLee Se-eun
Lee Se-eun
Lee Su-jin
LHLee Hae-eun
Lee Hae-eun
Bok-ja
CDChoi Deok-moon
Choi Deok-moon
Suk-young's Senior
JSJeong Seok-yong
Jeong Seok-yong
Mr. Kim
NK
Na Ki-soo
Suk-young's Father
ODOh Dal-su
Oh Dal-su
Nam Gyun-soo
YHYoo Hai-jin
Yoo Hai-jin
PD Kim
KJKim Joong-ki
Kim Joong-ki
Senior
PN
Park Nam-hee
Branch School Principal
PCPark Chae-ik
Park Chae-ik
Literary Society Member

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Once in a Summer — streaming FAQ

Which OTT platform streams Once in a Summer?

Once in a Summer is streaming on Amazon Prime Video, Hoopla and The Roku Channel in United States, and available to rent or buy on Amazon Video. It's not currently on Netflix.

Is Once in a Summer on Netflix?

No, Once in a Summer is not on Netflix in United States as of October 2026. It's currently on Amazon Prime Video and Hoopla.

Is Once in a Summer on Amazon Prime Video?

Yes — Once in a Summer is included with an Amazon Prime Video subscription in United States as of October 2026.

Where can I watch Once in a Summer for free?

Once in a Summer is available to stream free (with ads) on Hoopla and The Roku Channel in United States.