Seishokuki

Nogawa Izumi is a good student and a class representative but she has an increasingly high libido Its gotten to the point that shell claim to feel bad during class so she can run to the nurses 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