Joo Seung-ho is unable to do virtual reality due to’congenital hyperimmersion syndrome’, a phenomenon of excessive sensory amplification. One day, a string of unknown colors comes down to him. It is the tester of the ‘4th generation VRS’ device! When I was able to do virtual reality through testers, I thought for the first time. What he caught was a copper rope made of gold. When I experienced’Lost Sky Online’, commonly referred to as the fourth generation, I realized it. Congenital hyperimmersion syndrome was a poison in the past, but it was actually a blessing.