Nogawa Izumi is a good student, and a class representative, but she has
an increasingly high libido. It's gotten to the point that she'll claim
to feel bad during class, so she can run to the nurse's office and
masturbate. When she learns that the Earth is being invaded by aliens
that look like people dressed up as animals, it turns out her high sex
drive may be able to help protect the Earth. The first time Izumi is
attacked by the aliens, she is rescued by Usayama, a bunny alien whose
race was their previous victim. Usayama gives her a swimsuit that will
allow her to fight the aliens, but which also sends her constant arousal
through the roof. The scientific organization that Usayama is
affiliated with think that Izumi, with her high erotic level, may be the
person they've been looking for to fight the aliens. Will Izumi be able
to save the Earth?
