There is an invitation from what I assume is a wedding between Usagi and Tuxedo Kamen from Sailor Moon. It turns out to be just a big free-for-all sex party.
The sequel to the popular, original parody that shocked the world! All your favorite heroes and heroines return once again (along with a whole group of newcomers) for another stormy tale of intergalactic lust, S&M battles, and a quest for the seven mystical ballz!