Girls on Top(2007)

Girls on Top

The Earth is suffering from various abnormalities due to the collision with a comet. One of the biggest catastrophes was the decline in the number of male animals that could mate.
Humans are no exception to this phenomenon, and despite the efforts of scientists around the world to find out the cause, their lifespan is getting shorter and shorter. The only way to win such precious men is to enter a national school, a battleground for girls with excellent academic and physical strength!!

(Source: Naver, translated)