February 23, 1975.
The "Kofu Incident" in which two boys approached and encountered a UFO and its crew in Kofu City, Yamanashi Prefecture.
Y, the boy involved in the incident, breaks his silence for 49 years and speaks out the truth about the Kofu Incident.
And mysterious events and encounters with UFOs that continue to this day.
Why do UFOs appear around him?
The key lies with Ryujin...