Sirius the Jaeger

Yuuichirou has reunited with Mikaela at the Shinjuku Battle. But Mikaela was turned into a vampire... To save the "family," and to protect his fellow members, Yuuichirou needed to gain knowledge and power. He searched for ways to bring back vampire to human beings, and at the same time, trained hard working on the Cursed Gear. Meanwhile, Kureto calls Guren and tells him a shocking truth. That in one month, the main unit of the vampire will start attacking Tokyo. To get a head start against vampires, Kureto orders Guren to go to Nagoya. The noble extermination mission is about to open fire!

Everything you thought you knew about vampires is wrong. They can walk in the daylight and holy water doesn't burn them. In fact, vampires can pass as normal humans so perfectly that even other vampires have trouble spotting them. Until they drink human blood, that is; then they transform into monstrous beasts who mindlessly rape and murder. But not all vampires are evil. The secret task force that patrols Tokyo's vampire population has several fanged operatives, including half-human Yuuki Anzai, who believes that his human heritage lets him resist his species' basest cravings. But after Yuuki rescues college student Tsukasa Taira from a vampire stalker, he realizes that he's succumbing to urges he's never felt before.

MARS RED takes place in 1923, and vampires have existed for quite a while. But now, the number of vampires is increasing and a mysterious, artificial blood source called Ascra has appeared. The Japanese government, in turn, creates “Code Zero,” a unit within the army tasked with taking down the vampiric forces. And what better way to track vampires than by using vampires? Created by Lieutenant General Nakajima, this unit has historically been in the business of information war, but has been re-assigned to solve the vampire crisis. It's up to Code Zero and the S-class vampire Deffrot to investigate this increase and put a stop to it before society crumbles. Note: The first episode premiered on Funimation on March 29. Regular broadcast started on April 6, 2021.

The story takes place in a world where an unknown virus has killed the entire human population except for children under 13. Those children were then enslaved by vampires. The manga centers on Yuichiro Hyakuya, a human who dreams of becoming strong enough to kill all vampires.