Alice in Dreamworld

It is an unfamiliar world Airi face just after waking up. That is the "Dreamworld" where people dream their dream... She meets many people as led by a mysterious guy in all white clothes. Somehow strange people living in the dreamworld welcomes her openmindedly. But, a sudden gunshot tells the beginning of the "game". "Well, the killing game has started now..." Can Airi gets back to her world from the "Dreamworld"...?