Your home planet Erlth as you previously lived on has been invaded by an unknown lifeform,
ravaging through the lands like a scourge forcing humanity to the brink of extinction.
As the final hope you were chosen and departed on the ARK far away into another galaxy.
To re-populate mankind with the H-Roid Girls and revive to the glory it once was.
Your harem is ready for you to procreate with.