Yaritsukai to, Kuroneko

Kagari Shuuya awakens in a mysterious white room, where a futuristic interface offers him the chance to reincarnate in another world. Given the choice of race and four extra skills, he selects “Half-Vampire”—a race nearly identical to humans but with powerful vampire traits and one major weakness: Light magic. Cleverly, Shuuya counteracts this flaw by choosing a Light magic skill himself, inadvertently creating a new species that fuses darkness and light—Seivalt. His other skills include Language Comprehension, Chain Projection, and Growth Modifier. Armed with these overpowered abilities, Shuuya is reborn into a brutal world: a vast, desolate underground labyrinth with no people and no escape. Even with his cheats, survival is grueling. Months pass in isolation before he encounters a terrifying, winged beast—an Apostle—that viciously attacks him. Fleeing while healing, Shuuya stumbles upon a black tiger statue at an ancient altar. There, a fierce battle unfolds. Though his body is torn apart, his vampiric blood goes berserk, overwhelming the Apostle by draining her soul. After losing consciousness, Shuuya's remains mysteriously reassemble into a small, black cat—a Divine Beast from ancient times, now reborn to follow him on his journey. Thus begins the tale of a reincarnated hybrid warrior in a world of light, darkness, and forgotten legends.