Servamp

A stray cat turns out to be a vampire servant, dragging a clueless teen into a supernatural showdown.

Mahiru Shirota lives by a strict "keep it simple" mantra, avoiding any hassle that might complicate his quiet high‑school routine. That philosophy is put to the test when he scoops up a stray black cat on his way home and names it Kuro, unaware that the feline is actually a laid‑back vampire servant who can only survive by feeding on blood. One evening Mahiru discovers the cat’s true form after an accidental exposure to sunlight, and the creature—revealing himself as a lazy, night‑bound being—offers to stick around until dusk. Their uneasy partnership quickly spirals into chaos as Mahiru inadvertently signs a contract with Kuro, binding the two together. Soon, the duo is thrust into a hidden war among the Servamps, powerful vampire servants each wielding a unique weapon and a distinct personality. Mahiru finds himself caught between the whims of these blood‑thirsty entities and the looming threat of otherworldly hunters, all while trying to keep his ordinary life from unraveling. As the stakes rise, the unlikely pair must learn to trust each other, confront their own demons, and navigate a world where friendship is as dangerous as it is essential.

A 15-year-old forms a contract with a lazy vampire and gets pulled into a hidden war between supernatural servants. Expect regular fantasy violence with blood, some dark backstories involving abuse and experimentation, and mild language and innuendo.