Report an issue on this page.

Omega Vampire


TitleOmega Vampire
Original titleオメガヴァンパイア
Play timeLong (46h31m from 1 votes)
DeveloperKarin Chatnoir Ω
PublishersKarin Chatnoir Ω & Prototype


A world in which humans and vampires share a bare minimum coexistence.

The year is 20XX in Yokohama.

The Aoi Research Firm has shone light onto the medical world, developing an artificial source of blood called EX-BLOOD, putting an end to the shortage of blood.

At the same time, the vampires who had hidden themselves in the shadows emerge and declare that they will now coexist with humanity. They gradually began show themselves out in society.

But by nature, vampires prefer human blood. Some of them continued to assault humans. Even as those vampires that wish for a peaceful coexistence with humans try to keep the others in check, "vampire hunts" are also widespread, carried out by some humans due to a drug-like high a human experiences when drinking a vampire's blood.

Even so, at least on the surface, peace appeared to be maintained...

The protagonist, Moriya Keiichi, sustains life-threatening injuries in an accident. His best friend, Aoi Setsuna, saves his life with a brand new drug which utilizes a vampire's extraordinary healing capabilities. As a side effect, Keiichi's attribute ends up transforming from Beta into Omega.

Keiichi's newly Omega pheromones attract the vampires to him.

One day, Keiichi finds himself saved from a dire attack by an Alpha vampire, Ooizumi Genma.

As someone who hates vampires, Keiichi refuses Genma's help. However, he himself had become a half-vampire desiring blood...

"Dammit.....just what the hell have I become?!"

Male on Male Sex Only 3.0 More Than Seven Endings 3.0 Multiple Endings 3.0 Unique Routes 3.0 Vampire Protagonist 3.0 Male Protagonist 2.8 Protagonist with Voice Acting 2.7 Action 2.5 Adult Hero 2.5 Bad Ending(s) 2.5 Bad Endings with Story 2.5 Bloody ScenesS 2.5 Boy x Boy Romance Only 2.5 Branching Plot 2.5 Choices with 4 or More Options 2.5 Combat Capable Friends 2.5 Completion Status Indicator 2.5 Fighting Hero 2.5 Fighting Protagonist 2.5 Foreigner Hero 2.5 Genetic ResearchS 2.5 Genius Hero 2.5 Hero with Glasses 2.5 Hero with Sexual Experience 2.5 High School Student Protagonist 2.5 Immortal Hero 2.5 Immortal Protagonist 2.5 Interracial/interspecies Romance 2.5 Kissing SceneS 2.5 Marriage EndingS 2.5 Muscular Hero 2.5 Normal Scene Recollection 2.5 Protagonist's Senpai as a Hero 2.5 Read Text Marking 2.5 Relationship Chart 2.5 Save Memo Function 2.5 Scientist Hero 2.5 Secret SocietyS 2.5 Seke Protagonist 2.5 Sexual Content 2.5 Superpowers 2.5 Timed Choices 2.5 Unarmed Combat 2.5 Under the Same Roof 2.5 Unlockable Event 2.5 Unlockable Hero(ine) 2.5 Vampire Hero 2.5 Villainous Hero 2.5 Voiced Thoughts 2.5 Werewolf Hero 2.5 White Haired Hero 2.5 Protagonist with a Face 2.3 Voice Saving 2.3 Actor Hero 2.0 Episodic Story 2.0 Gentle Protagonist 2.0 Hero with Gothic Look 2.0 High School Student Hero 2.0 Male PregnancyS 2.0 Orphan Hero 2.0 Orphan Protagonist 2.0 Proactive Protagonist 2.0 Protagonist with a Sprite 2.0 Rape 2.0 Reversible Yaoi PairingS 2.0 Shapeshifting 2.0 Side Images 2.0 Unlockable Routes 2.0 Unlockable Side Stories 2.0 Wealthy Hero 2.0 WeddingS 2.0 Flashback 1.5 ADV 1.0 Hero with a Sword 1.0 Hero with Eye Covering Hairstyle 1.0 Other Perspectives 1.0 Skip Scenes 1.0 Timid Protagonist 1.0


Japanese (4)
2016-12-0218+Omega Vampire - First Press Deluxe Edition (DVD Version)
2016-12-0218+Omega Vampire - First Press Deluxe Edition (USB Version)
2016-12-2218+Omega Vampire - Regular Edition (USB Version)
2019-08-2917+Omega Vampire
English (1)
TBAOmega Vampire (unofficial patch)


  • Artist
  • Ranpumi
  • Vocals
  • Sawa ManakaOP "Shoudou Keloid Heroic" (as the character Moriya Keiichi)

Full character list

Character summary

Moriya KeiichiProtagonist
Voiced by Sawa Manaka
Aoi SetsunaMain character
Voiced by Hanasaki Ouji
Heinrich SchellenbergMain character
Voiced by Kurose Taka
Ooizumi GenmaMain character
Shizuru HakurouMain character
Voiced by Aoi Yuuma
Arimura KaiSide character
Voiced by Mano Dai
Furuya HiroshiSide character
Voiced by Amekanmuri Rui
Fuwatari HarukiSide character
Voiced by Satonaka Kanete
Gousawa GisukeSide character
Voiced by Oono Ken
Kumada TakeshiSide character
Murasame HakaseSide character
Shibukawa TatsunosukeSide character
Voiced by Kuroi Isamu
Tani TomokiSide character
Voiced by Minamoto Ryoma
Yaotome HakaseSide character
Voiced by No☆boru

User stats

Vote stats
67 votes total, average 7.43 (good)
Recent votes(show all)


Popularity: ranked #3806 with a score of 0.52

Bayesian rating: ranked #1327 with a rating of 6.90



Omega Vampire - Regular Edition (USB Version)

Screenshot sf101397Screenshot sf101398Screenshot sf101399Screenshot sf101400Screenshot sf101401Screenshot sf101402Screenshot sf130010Screenshot sf130011