Necossas: Sixネコサスシックス ; ネコサス：シックス ; ネコサス:シックス ; 猫耳娘战队

One night an android which looked like a cat (a Necossass: Six type) suddenly appears in Katsuhiko Katsu's room. The android said that she comes from the 22nd century and that Katsu had left a note in a time capsule stating that he wanted to live with a robot-cat.