Where to Watch
Available platforms
Not available on VOD in your region.
⚠ Availability may change. Data provided by JustWatch via TMDB.
Classic overview
The joys of summer break; warm weather, sun soaked beaches, time off from school, and in the case of Yuuta Yamauchi, a torrid love affair with your cousin. Summer Sis details the sexual relationship between Yuuta and his cousin, Kei Higashide, who offered to help him study for his college entrance exam. As their relationship develops, Kei becomes aware of a girl named Youko who may be toying with Yuuta. Yuuta's summer is about to get very complicated, and it's anybody's guess if he'll actually get any studying done!
AI Spotlight
Seasons
All seasons →Cast
Creators
Directed by
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Nee Summer!
姉SUMMER!
Where to Watch
Available platforms
Not available on VOD in your region.
⚠ Availability may change. Data provided by JustWatch via TMDB.
Classic overview
The joys of summer break; warm weather, sun soaked beaches, time off from school, and in the case of Yuuta Yamauchi, a torrid love affair with your cousin. Summer Sis details the sexual relationship between Yuuta and his cousin, Kei Higashide, who offered to help him study for his college entrance exam. As their relationship develops, Kei becomes aware of a girl named Youko who may be toying with Yuuta. Yuuta's summer is about to get very complicated, and it's anybody's guess if he'll actually get any studying done!
AI Spotlight
Seasons
All seasons →Cast
Creators
Directed by
You might also like
Overflow
2020
Secret Mission - Undercover Agents Never Back Down!
2023
Joshiochi! 2-kai kara Onnanoko ga... Futtekita!?
2018
Sekirei
2008
Araiya-san! Ore to Aitsu ga Onnayu de!?
2019
X
2001
Samurai Girls
2010
Peter Grill and the Philosopher's Time
2020
The Qwaser of Stigmata
2010
I Want You To Make a Disgusted Face and Show Me Your Underwear
2018
Nee Summer!
姉SUMMER!
Where to Watch
Available platforms
Not available on VOD in your region.
⚠ Availability may change. Data provided by JustWatch via TMDB.
Classic overview
The joys of summer break; warm weather, sun soaked beaches, time off from school, and in the case of Yuuta Yamauchi, a torrid love affair with your cousin. Summer Sis details the sexual relationship between Yuuta and his cousin, Kei Higashide, who offered to help him study for his college entrance exam. As their relationship develops, Kei becomes aware of a girl named Youko who may be toying with Yuuta. Yuuta's summer is about to get very complicated, and it's anybody's guess if he'll actually get any studying done!
AI Spotlight
Seasons
All seasons →Cast
Creators
Directed by
You might also like
Overflow
2020
Secret Mission - Undercover Agents Never Back Down!
2023
Joshiochi! 2-kai kara Onnanoko ga... Futtekita!?
2018
Sekirei
2008
Araiya-san! Ore to Aitsu ga Onnayu de!?
2019
X
2001
Samurai Girls
2010
Peter Grill and the Philosopher's Time
2020
The Qwaser of Stigmata
2010
I Want You To Make a Disgusted Face and Show Me Your Underwear
2018