The mysterious agency that ranks first in urban legends, "7Seven", which is omniscient and omnipotent, can do anything as long as it has money. It is said that only lucky people can discover it. There is the boundary between reality and illusion, the intersection of past and future, and one world after another.
It was a place that controlled reality and destruction, but all changes were submerged in the silent passage.
Until one day, an ordinary girl who didn't belong there walked in, so...
——What is your future? See it with your own eyes. However, when you know all this, you have already fallen.