Dream is considered as the process to organize memories. Sometimes it has obvious story, sometimes it’s completely chaotic.
It isn’t always that all things you see in the dream must be what you’ve experienced physically.

In such as unsolved world, what we see is superficially quite complicated. At least the element of dream is absolutely based on what we have seen, which is 100% real subject.

Then, how do we visually see what’s upon on your dream, and how do these go like? The only way to unveil our visual dream is to intensively accumulate what we see like below.