Aphromatrix-C-37
Just as Ben finally defeated Vilgax and acquired the Ultimatrix, the interspecies cultural exchange pays him a visit. If anyone remembers, the Interspecies cultural exchange is a contract between various Demihuman races such as mermaids, centaurs, demons and the like and humans. The contract allows various non human species to live with and interact with humans.
And because of the possibility of having aliens be a part of the Interspecies cultural exchange as well as an alliance with the Plumbers. Max had volunteered ben to be a host family. And he's not a host for just one sexy monster girl, but several, will he accept their hearts? Or will he be unable to keep it in his pants long enough?