The Family Complete (2010)

What begins like a normal Japanese family drama quickly descends into absurdity when a man dressed in a bear suit attacks the young-looking grandfather and uses him for furry sex. Soon, incest is the norm, with everyone getting a piece of grandpa, especially the men. Well, everyone but the third son, who prefers to cruise for guys outside. And why is everyone in the household so young-looking? To be revealed..