I'm a "Behemoth," an S-Ranked Monster, but Mistaken for a Cat, I Live as an Elf Girl's Pet

No one ever wishes to be reborn as a house cat, least of all a fallen knight. After perishing in a valiant battle against the forces of darkness, a heroic warrior expects his next life to begin with equal glory. Instead, he awakens to discover that he has been reincarnated as a behemoth—one of the most fearsome and powerful monsters in existence. However, there is a humiliating catch: in its infant stage, this legendary S-ranked beast bears a striking resemblance to nothing more than an adorable kitten. His bewildering new reality takes another unexpected turn when a beautiful elven adventurer stumbles upon him. Rather than slaying the supposedly dangerous creature or ignoring a stray animal, she mistakes his true nature entirely and rescues him from the brink of death. Now, taken in as her beloved pet, the former knight must navigate a deeply confusing existence. Trapped inside the body of a world-shaking monster yet treated as a cuddly companion, this unlikely feline warrior embarks on a baffling journey where his past honor and present predicament constantly collide.