isn't it obvious? that chicken impregnated the box, accidentally (which is why he doesn't look so thrilled) and the box just gave birth to the fully-grown, fully-dressed girl (tube = umbilical cord) and that other guy heard about the birth and rushed to the hospital, so excited that he forgot pants. Then he was chosen as the godfather and decided to celebrate by playing a weird-looking board game.
i think hes like feeding the chick via umbilical chord from the giant yellow man on the right. I guess the box is a food processing converter. But i still don't understand the little center piece on the floor. but then again, japs do poop on other japs so ya never really know with those silly bastards