I Am Behemoth Of The S Rank Monster But I Am Mistaken As A Cat And I Live As A Pet Of Elf GirlS-Rank Monster no Behemoth Dakedo, Neko to Machigawarete Erufu Musume no Kishi (Pet) Toshite Kurashitemasu; I Am Behemoth Of The S Rank Monster, But I Am Mistaken As A Cat And I Live As A Pet Of Elf Girl; I'm a “Behemoth,” an S-Ranked Monster, But Mistaken for a Cat, I Live As an Elf Girl's Pet; I’m an S-Rank "Behemoth" Monster, but I’m Living as a Knight (Pet) of an Elf Girl; Pet Behemoth; Soy un monstruo de rango S, Behemoth, pero me confundieron con un gato y ahora vivo como el caballero (mascota) de una chica elfa.; 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; Sランクモンスターの《ベヒーモス》だけどネコと間違われてエルフ娘の騎士として暮らしています; Ich bin ein mächtiger Behemoth und lebe als Kätzchen bei einer Elfe; Я монстр S-класса Бегемот, но меня перепутали с котом, и я живу у эльфийки как домашний питомец; 虽然是S级魔兽“比蒙巨兽” 却以猫的模样、成为精灵娘的骑士的日常
Elven girl, "Aria" is an adventurer. A small beast with an adorable face embraces Aria's fruitful chest, she decides to keep it as a pet and names it "Tama". At first sight it's just an average cat, but Aria has yet to notice that Tama is a former Knight and that his identity is not a cat, but a young monster of the strongest class "Behemoth".