Gakuen Sousei Nekoten!

From Yen Press: At Matabi Academy, students are allowed to bring their pet cats to the dorms. For Yumi Hayakawa, whose favorite hobby is making clothes for her kitty Kansuke, Matabi seems like a sure bet. After all, nothing can possibly go wrong with her best friend at her side! But on the first day of school, the two find themselves face-to-face with a murderous demonic minion on campus! Will Yumi and Kansuke be able to defend themselves and their school against an ancient cat demon’s thirst for vengeance?