Dream Hacker -Musouban-

It seems there's a way to control dreams. You create the image in your head of the dream you want to dream beforehand, but the details are unknown. You would be free to change what happens in the dream to whatever you would like and it would feel just like it was the real thing, or maybe even better. That's right, it's a dream so you can do whatever you want. You can totally let your desires run wild. [Taken from English DLsite]