[Main Couple: Two Men + Multiple Instances]
The live-action interactive game "Myriad Phenomena" went online, and at first everyone had a great time playing. Somehow, though, players started entering the game passively instead of by choice, while those who hadn't entered began slowly falling asleep...
What secrets unknown to the world are hidden behind all this?
Players who were forced into the game but failed seem to have truly disappeared...
A maniacal prompt sounded: "If you die, you'll really be dead. Are you ready to enter the game, my children?"
