Seishokuki

Nogawa Izumi is a diligent student and serves as the class representative, but she has a growing sexual desire. It has become so intense that she will pretend to feel unwell during class in order to sneak away to the nurse’s office and masturbate. However, when she discovers that Earth is under attack by aliens disguised as animals, her high libido may actually be useful in defending the planet. During her first encounter with the aliens, she is saved by Usayama, a rabbit-like alien whose species was previously targeted by the invaders.