Happiness Review: A Boy Is Turned Into a Vampire and Joins a Hidden Society of People Who Are Becoming Something Else

Quick Take

• A boy is turned into a vampire and must navigate a world of people losing their humanity while trying to find the girl who changed him
• Shuzo Oshimi (Flowers of Evil) brings the same psychological precision to vampire horror
• 10 volumes, complete; the title is ironic in ways that clarify over the series

Who Is This Manga For?

• Readers who want vampire horror with genuine psychological depth
• Fans of Oshimi's other work (Flowers of Evil, Blood on the Tracks)
• Anyone who wants horror manga examining what it means to lose human appetite and replace it with something else
• Readers who can handle mature horror content

Content Warnings & Age Rating

Age Rating: M (Mature) Content Warnings: Vampire violence, blood, the transformative attack is a form of sexual assault in framing, psychological horror, body horror of transformation

The content is mature. The psychological approach is Oshimi's signature.

Yu's Rating

Category	Score
Story Depth	★★★★☆
Art Style	★★★★★
Character Development	★★★★☆
Accessibility for Non-Japanese Readers	★★★★☆
Reread Value	★★★★☆

Story Overview

Makoto Okazaki is bullied, unremarkable, trying not to be noticed. Late one night he is attacked by a vampire girl who drains him partially and then disappears. He survives but begins changing — the hunger for blood, the sensitivity to sunlight, the enhancement of senses.

He is drawn into a group of others who have been changed. Among them is Yuuki, a boy further along in the transformation whose perspective gives Makoto a glimpse of what he might become. The search for the girl who changed him becomes the series' engine.

Oshimi uses the vampire premise to examine identity transformation — what we give up when we change, whether the change is chosen, and what the word "happiness" means to someone who is no longer entirely human.

Characters

Makoto Okazaki — His transformation forces questions about who he was before and who he is becoming; his specific bullied-boy interiority makes the vampiric change more charged.

Nora — The girl who changed him; her nature and motivations are the series' central mystery.

Yuuki — The further-transformed guide whose relationship with Makoto is the series' most psychologically complex.

Art Style

Oshimi's art is exceptional — his character designs are realistic and expressive, the transformation sequences are drawn with body horror precision, and his sensitivity to psychological states is as present here as in Flowers of Evil. The blood imagery is handled with visual intentionality.

Cultural Context

Happiness draws on vampire mythology while framing it through Japanese concepts of social exclusion — the bullied boy who is changed into something that the social hierarchy cannot account for. The vampire community Makoto discovers functions as an alternative social structure.

What I Love About It

The title. Oshimi applies his signature ironic examination to the concept of happiness in this context: what does a vampire want, and can wanting blood and beauty be called happiness, and if not, what is the alternative? The question runs through the series without being answered simply.

What English-Speaking Fans Say

Western readers familiar with Oshimi's work came to Happiness with calibrated expectations and found it consistent with his psychology-forward approach. The vampire premise is cited as providing a framework for the same self-construction questions he examines in his other work.

Memorable Scene ⚠️ Spoiler Warning

The sequence where Makoto first fully gives in to the vampire hunger — what it looks like from inside his perspective, and what he feels about it afterward — is the series' most honest examination of what transformation actually means.

Similar Manga

• Flowers of Evil — Same author; psychological horror, no vampire content
• Blood on the Tracks — Same author; psychological family horror
• Vampire Knight — Vampire romance, much lighter
• Tokyo Ghoul — Human becoming monster, similar transformation theme

Reading Order / Where to Start

Volume 1 — the transformation establishes in the first chapter.

Official English Translation Status

Kodansha USA published the complete 10-volume series. All volumes available.

Pros & Cons

Pros

• 10 volumes, complete
• Oshimi's psychological approach distinguishes it from pure vampire horror
• Art is exceptional throughout
• The title's irony is handled thoughtfully

Cons

• The transformative attack framing may be difficult
• Darker than typical vampire manga
• The pacing is deliberate before the final arc

Format Comparison

Format	Notes
Individual Volumes	Kodansha USA; standard
Digital	Available

Where to Buy

Read the first volume. If it doesn't hook you, put it down. It'll hook you.

Start with Volume 1 →

---

This post contains affiliate links. If you purchase through these links, I may earn a small commission at no extra cost to you. As an Amazon Associate, I earn from qualifying purchases.