Yumi's just enrolled at a new school...for one reason - she's allowed to bring her pet cat to the dorm! It's all fun at first, but Yumi soon finds herself in the middle of a literal catfight! For imprisoned on school grounds is a demon cat that's itching to make a break for it. And when Yumi is attacked by one of its underlings, she discovers that the members of the school student council and their cats are actually fighting an age-old battle to keep the feline fiend at bay! Will Yumi join the fight?