Completed
“Siblings' relationship darkens into disturbing territory after parents' divorce, exploring twisted familial love and psychological trauma.”
Oyasumi Sex
おやすみせっくす
6.89
12,906 viewers · 99 favorites
Hentai
Would You Love or Hate This?
AI-powered analysis tailored to your taste
Based on your preference for character-driven stories with layered emotional arcs, this title's exploration of identity and belonging would deeply resonate. The pacing mirrors series you've rated highly, and its thematic depth aligns with your appreciation for nuanced storytelling...
However, the slow initial episodes might test your patience given your history of dropping shows that don't hook you early. The art style shift in the middle arc could also be a concern...
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Honest pros & cons
Based on your library
Synopsis
Siblings' relationship darkens into disturbing territory after parents' divorce, exploring twisted familial love and psychological trauma.
There is no bond stronger than the one between siblings. Yui and her brother Akira have always shared an unusually close relationship, one that has grown increasingly complex as they've matured. Following their parents' divorce, Akira finds himself thrust into a caretaker role, responsible for his younger sister's daily needs and well-being. As they navigate their new family dynamic alone, the boundaries between brother and sister begin to blur in ways neither anticipated. Akira struggles with feelings he knows he shouldn't have, while Yui discovers that her own emotions toward her brother are far more complicated than simple sibling affection. This dark psychological drama explores the dangerous territory where familial love can transform into something far more disturbing, examining how isolation and trauma can warp the most fundamental human relationships.
What people say
Community consensus
Derived from 8 sampled reviews
7.3
/10
What 8 viewers settled on.
75%
recommend
Score distribution
median 9
mode 10
σ 3.46
Agreement
Polarized
σ 3.46 · split reception
The polarity gap
7.7 pts
Recommenders 9.2 · others 1.5
Yes
No
Score over time
↓ 2.75
Running avg · Nov 2018 → Sep 2025
Snap verdicts
· shortest highly-rated reviews
- 9 “The story is excellent, featuring fantastic character development and one of the best endings produced by this studio. While the art starts off a bit weak in the first episode and the conclusion...”
- 10 “This series stands out from the typical H-genre by offering an interesting story and unique character dynamics that show a genuine effort in narrative development. However, I was left completely...”
- 7 “This title stands out for its unique approach to the sibling dynamic, specifically by avoiding the common "step-sister" trope and effectively exploring the internal perspectives of both characters....”
Verbosity
Short · 50%
Medium · 50%
Long · 0%
Watch Order & Related
A self-contained story.
No sequels, spin-offs or alternate tellings — Oyasumi Sex begins and ends here.
Cast
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See all credits →Production slate
- Format 4 × 15′ eps × min
- Total runtime 1h 00m all episodes
- Aired Oct 2018 – Sep 2021
- Source Ova media type
- Rated Rx Hentai
- Ref. BS-13524 catalog
Produced by
- Mary Jane Producer