S-Rank Monster no "Behemoth" Dakedo, Neko to Machigawarete Elf Musume no Pet to Shite Kurashitemasu
I'm a Behemoth, an S-Ranked Monster, but Mistaken for a Cat, I Live as an Elf Girl's Pet·Ｓランクモンスターの《ベヒーモス》だけど、猫と間違われてエルフ娘の騎士（ペット）として暮らしてます
A knight who died in battle awakens reborn as a behemoth, a powerful S-ranked monster. Due to the creature's youthful appearance, he is mistaken for a kitten. Despite being viewed as cute and harmless, he possesses the strength of a top-tier beast. He must navigate his new form while safeguarding the elf who has adopted him, balancing his warrior’s pride with his unexpected role as a pet.
