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Omega Vampire


Omega Vampire
Play timeLong (46h31m from 3 votes)
DeveloperKarin Chatnoir Ω
PublishersKarin Chatnoir Ω & Prototype
Shops» JP¥ 5800 @ DLsite
» US$ 56.99 @ PlayAsia


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 Omegaverse 3.0 Unique Routes 3.0 Protagonist with Voice Acting 2.7 Vampire Protagonist 2.7 Male Protagonist 2.6 Adult Hero 2.5 Bad Ending(s) 2.5 Bad Endings with Story 2.5 Branching Plot 2.5 Choices with 4 or More Options 2.5 Completion Status Indicator 2.5 Foreigner Hero 2.5 Genetic ResearchS 2.5 Genius Hero 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 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 Scientist Hero 2.5 Secret SocietyS 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 Voiced Thoughts 2.5 White Haired Hero 2.5 Action 2.3 Bloody ScenesS 2.3 Boy x Boy Romance Only 2.3 Combat Capable Friends 2.3 Fighting Hero 2.3 Fighting Protagonist 2.3 Hero with Glasses 2.3 Marriage EndingS 2.3 Protagonist with a Face 2.3 Save Memo Function 2.3 Seke Protagonist 2.3 Vampire Hero 2.3 Villainous Hero 2.3 Voice Saving 2.3 Werewolf Hero 2.3 Actor Hero 2.0 Anal Masturbation 2.0 Bathroom Sex 2.0 Binaural Audio 2.0 Bisexual Hero 2.0 Butterfly 2.0 CloningS 2.0 Confinement 2.0 Contemporary Fantasy 2.0 Doggy Style 2.0 Episodic Story 2.0 Frot 2.0 Gang Rape 2.0 Gentle Protagonist 2.0 German Hero 2.0 Hero with a Fang 2.0 Hero with Gothic Look 2.0 High School 2.0 High School Student Hero 2.0 Kidnapping 2.0 Male on Male Rape 2.0 Male PregnancyS 2.0 Missionary Position 2.0 Modern Day Japan 2.0 Orphan Hero 2.0 Orphan Protagonist 2.0 Penile Masturbation 2.0 PossessionS 2.0 Pregnancy Good EndingS 2.0 Proactive Protagonist 2.0 Protagonist with a Sprite 2.0 Quickie Fix Position 2.0 Rape 2.0 Rape Involving Drugs 2.0 Reversible Yaoi PairingS 2.0 Sex in Front of an Audience 2.0 Sexual Fantasizing 2.0 Sex with Others 2.0 Shapeshifting 2.0 Side Portraits 2.0 Single Handjob 2.0 Sitting Sex 2.0 Sounds of Copulation 2.0 Spoons 2.0 Standing Sex 2.0 Tsukkomi Protagonist 2.0 Tsundere Hero 2.0 Tsundere Protagonist 2.0 Unavoidable Hero Rape 2.0 Unavoidable Rape by Others 2.0 Unlockable Routes 2.0 Unlockable Side Stories 2.0 Wealthy Hero 2.0 WeddingS 2.0 Flashback 1.5 Hero with a Sword 1.5 Hero with Eye Covering Hairstyle 1.5 Other Perspectives 1.3 ADV 1.0 Anal Fingering 1.0 Brothel 1.0 Bullying 1.0 Comedy 1.0 Cross-dressing 1.0 Discrimination 1.0 Drug Use 1.0 Game Over 1.0 Gore 1.0 Group Sex of Several Males 1.0 On the Run 1.0 Outdoor Sex 1.0 Pillow Talk 1.0 Pole Dancing 1.0 Poor Protagonist 1.0 Skip Scenes 1.0 Timid Protagonist 1.0 Vibrators 1.0


Japanese (6)
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 - Package Edition
2019-08-2917+Omega Vampire - Download Edition
2019-12-2918+Omega Vampire - Download Edition
English (1)
2021Omega 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
77 votes total, average 7.34 (good)
Recent votes(show all)


Popularity: ranked #3592 with a score of 0.57

Bayesian rating: ranked #1477 with a rating of 6.86



Omega Vampire - Regular Edition (USB Version)

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