Finished
“Overworked teen Makoto supports ill sister, faces despair upon learning her limited time, reevaluating life's meaning.”
Massacre Happy End
虐殺ハッピーエンド
7.16
7,234 rank · 14,555 readers · 205 favorites
Psychological
Horror
Mystery
Supernatural
Suspense
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
Overworked teen Makoto supports ill sister, faces despair upon learning her limited time, reevaluating life's meaning.
High school student Kusakabe Makoto has to work all day to raise money for the treatment of his younger sister, who suffers from a serious illness. The father is unemployed, the mother ran away, leaving the children, bullying at work... Despite all this, he does not lose hope and continues to live for his sister. But having learned that she did not have long, Makoto falls into despair. Fear of the unknown causes him to take a different look at the value of human life. (Source: Hakusensha, translated)
What people say
Community consensus
Derived from 14 sampled reviews
7.6
/10
What 14 readers settled on.
91%
recommend
Score distribution
median 8
mode 8
σ 1.99
Agreement
Polarized
σ 1.99 · split reception
The polarity gap
5.6 pts
Recommenders 8.6 · others 3.0
Yes
No
Score over time
↑ 0.57
Running avg · Aug 2021 → Nov 2025
Snap verdicts
· shortest highly-rated reviews
- 10 “This manga is an incredibly addictive read that features a gripping plot centered on time travel loops, clever mechanics, and deep character exploration. While the character development is strong,...”
- 8 “This work is a true hidden gem featuring a story full of impactful moments, phenomenal art, and well-developed characters whose motivations are generally easy to understand. While there are rare...”
- 10 “The first nine chapters are an absolute masterpiece with an engaging concept, complemented by stunning, non-generic art that makes every character look cool and beautiful. However, the experience...”
Verbosity
Short · 43%
Medium · 14%
Long · 43%
Read Order & Related
A self-contained story.
No sequels, spin-offs or alternate tellings — Massacre Happy End begins and ends here.
Cast
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See all →Publication slate
A Manga Publication
- Format 55 × 8 ch × vol
- Total read 7h 20m approx
- Published Aug 2017 – Dec 2019
- Source Manga media type
- Ref. BS-M54492 catalog