Dark Moon: The Blood Altar
DARK MOON -黒の月: 月の祭壇- (Dark Moon: Tsuki no Saidan)
- Fantasy
- School
- Vampire
- Episodes
- 12
- Duration
- 23 min per ep
- Aired
- Jan 10, 2026 to Mar 28, 2026
- Status
- Finished Airing
Synopsis
Sooha has spent her life concealing her extraordinary abilities, fearful that revealing them would lead others to mistake her for a vampire. After being accused of involvement in her childhood friend's tragic death, she seeks refuge at Decelis Academy—a nocturnal institution where supernatural entities are believed to be barred from entry. Here, she hopes to find some semblance of normalcy away from the shadows of her past.
At Decelis, Sooha forms a bond with Heli, a compassionate student who embraces her secret rather than shunning her. As he introduces her to his tight-knit group of friends—Jaan, Jino, Shion, Jakah, Noa, and Solon—Sooha discovers that each possesses unique powers, creating an intriguing dynamic among them. However, their connection transcends mere friendship, hinting at a deeper, almost instinctive loyalty to her. Amidst the backdrop of a recent murder attributed to a vampire, the group's troubled history begins to surface, drawing Sooha into a perilous struggle between vampires and werewolves. As the threat looms closer, she must confront her own feelings about the creatures she has long detested and navigate the complexities of her newfound relationships.
Otaku Consensus
Dark Moon: The Blood Altar works best as a frictionless paranormal reverse-harem adaptation: Shouko Shiga’s direction and Touko Machida’s series composition keep the 12-episode run light, the Decelis boys deliver the “mysterious pretty boys” appeal, and the HYBE/Naver Webtoon origin gives it a distinct idol-media hook. The verdict is mixed-to-cool: reviewers found it comfortable enough for genre loyalists, but repeatedly criticized its clichéd supernatural plotting, hollow characterization, and unimpressive animation, reflected in its 6.47 MAL score and 63/100 AniList score.
Why You Should Watch
Watch Dark Moon: The Blood Altar if you want the school-vampire mood of Vampire Knight or the boy-focused gothic fantasy pull of Diabolik Lovers without the nastier melodrama or heavy horror edge. Its pleasures are specific: a 12-episode, low-commitment reverse harem; a primarily male supernatural ensemble; HYBE’s transmedia polish; and a fandom-friendly atmosphere where the character dynamic matters more than lore density. It is not the pick for viewers chasing a frightening vampire story or intricate werewolf-vampire politics. It is the pick for viewers who like pretty-boy tension, secret powers, nocturnal academy aesthetics, and anime that feels closer to a webtoon/idol project than a traditional monster thriller. Keep expectations calibrated and it becomes an easy, mildly addictive genre snack.
Key Characters
- SSooha
Sooha is the rare reverse-harem center whose appeal comes less from comic indecision and more from being the emotional trigger for the series’ loyalty-fantasy structure, matching AniList’s strong Female Protagonist and Male Harem tag emphasis.
- HHeli
Heli functions as the audience’s main gateway into the Decelis group, and fan discussion around him tends to fold into the show’s broader “mysterious pretty boys” appeal rather than treating him as a standalone dramatic lead.
- JJaan
Jaan represents the ensemble-first design of the series: one of the named boys whose presence supports the show’s Primarily Male Cast identity and its character-collection appeal.
- SSolon
Solon is part of the supernatural friend group that makes the adaptation read as a character-forward HYBE project, a strength for viewers invested in group chemistry and a weakness for critics wanting deeper individual writing.
What Makes It Stand Out
- 1
The anime is a one-cour TROYCA production that aired from January 10 to March 28, 2026, giving the adaptation a compact 12-episode shape rather than a long-form webtoon rollout.
- 2
Its source context is central to its identity: Dark Moon: The Blood Altar adapts a manhwa/webtoon project created by HYBE in collaboration with Naver Webtoon, with HYBE credited for the original plan.
- 3
The tag profile is unusually explicit about its appeal: AniList lists Vampire at 100%, Female Protagonist at 92%, Ensemble Cast at 79%, Male Harem at 77%, Super Power at 76%, Werewolf at 66%, and Primarily Male Cast at 64%.
- 4
The production leans into audio branding as much as monster atmosphere, with Takatoshi Hamano as sound director, Naoki Chiba handling music, and online reactions specifically noting enjoyment of the opening song by ENHYPEN.
- 5
The English-language release is notable for its dub production credits, including Marissa Lenti as ADR Director, Alex Mai and Steven Kelly as Assistant ADR Directors, and Patrick Morphy as ADR Engineer.
Fun Facts & Trivia
- Fun fact 1
- Despite its vampire-school packaging, the show’s broader reception landed in the middle of the database pack: MAL lists it at 6.47/10 from 5,332 votes, with a rank of #7971 and popularity of #4731.
- Fun fact 2
- AniList’s numbers tell a similar story to MAL’s: 63/100 overall, but with 328 favourites, indicating a small but clear pocket of committed fans.
- Fun fact 3
- Masami Inomata handled character design, a key role for a series whose appeal depends heavily on a large, attractive ensemble rather than a single monster-villain showcase.
- Fun fact 4
- Touko Machida’s series composition credit is especially relevant because the adaptation has to compress a webtoon-style supernatural romance structure into a single Winter 2026 cour.
- Fun fact 5
- Early and post-run commentary converged on the same conclusion: it is more satisfying as a light paranormal reverse harem than as a threatening vampire drama or tightly engineered supernatural mystery.
Studios
- TROYCA
