Bakumatsu no Spasibo

There exist creatures of darkness and evil that plague the night, devouring any human unfortunate enough to be caught in their grasp. On the other side is Hellsing, an organization dedicated to destroying these supernatural forces that threaten the very existence of humanity. At its head is Integra Fairbrook Wingates Hellsing, who commands a powerful military and spends her life fighting the undead. Integra's vast army, however, pales in comparison with her ultimate weapon: the vampire Alucard, who works against his own kind as an exterminator for Hellsing. With his new vampire servant, Seras Victoria, at his side, Alucard must battle not only monsters, but all those who stand to oppose Hellsing, be they in the guise of good or evil. In a battle for mankind's survival, Hellsing Ultimate proves that appearances are not all they may seem, and sometimes the greatest weapon can come in the form of one's worst nightmare. [Written by MAL Rewrite]

Vampires have existed for centuries and live under the rule of the Scarlet Moon. Once a year, "Visual Prison" occurs, a visual kei competition where the vampire who sings the most beautiful song is bestowed with great power by the Scarlet Moon. At the forefront of the competition are ECLIPSE—the reigning champions who stand for an established order, and LOST EDEN—a group that believes the strongest should rule. Ange Yuki is a lonely boy with no confidence in his singing ability. He moves to Harajuku in search of a musician he idolizes, but during his quest, he gets entangled in one of the many live performance clashes between ECLIPSE and LOST EDEN. Their fascinating stages stun him, but he soon collapses, overcome by bloodlust. Regaining consciousness, Ange finds himself under the care of Guiltia "Guil" Brion, the musician he admires, and learns that he is a dhampir—half-human, half-vampire. While Ange now has the privilege of participating in the upcoming Visual Prison, Guil explains that he will not join him in this endeavor. Meanwhile, Ange encounters Robin Laffite, a foreigner from England who is enamored by his astonishing singing voice. With the day of the competition slowly creeping up, Ange has to put together a capable unit in an exciting race against time. [Written by MAL Rewrite]

Vampires are known to have many weaknesses that balance out their incredible power, but the vampire lord Draluc happens to be weak to pretty much anything. The vampire hunter Ronald receives a job to infiltrate the castle of the so-called "Invincible Progenitor" and rescue a woman's son from the monster within. But upon arriving, he is dumbfounded to discover that the vampire quickly turns to ash by something as trivial as a clap of his hands! Moreover, the child he was sent to save had merely wandered in to play the vampire lord's video games while he slept! In a disastrous turn of events, Draluc's castle is destroyed, and the fragile vampire decides to move in with the hunter who has only just defeated him. Ronald, Draluc, and the vampire's pet armadillo John form quite the eccentric team as they are forced to work together while fending off Ronald's violent editor, the lesser vampires plaguing the city, and even their fellow vampire hunters. [Written by MAL Rewrite]

Fifth season of Strike the Blood.