When Aria the elf finds an adorable little kitten, she quickly grows to love it a bit more than might be healthy for her... mainly it's because her sweet little pussy isn't really a cat at all! No, the cute and cuddly creature that Aria calls Tama is actually a former knight reborn as a Behemoth, a legendary S-class monster that merely happens resembles a loveable domestic feline! Fortunately, Tama loves Aria as well and is more than happy to use his powers to defend the odd elf girl from dangers, real or otherwise!