[Machine Translation] Visitors from outer space to Fuchu! Fighting for the future of the earth (? ) Volume 20! The Game Production Department (tentative) is wandering in the Sea of Trees, and while they are doing something and other things, they come across a mysterious flying object. What in the world is "that thing"? Among the puzzled members of the Game Production Department (tentative), there was only one member who had foreseen this situation. The game started in a huge black cube, which we managed to get into, was a nostalgic game ("Space Erotic Book Contest"). When they reach the goal and everything becomes clear, what will "they" who have been entrusted with the future of the earth choose?