In the year 2040, Reito Mizuhara is suffering from a rare disease and is put into cryostasis while waiting for a life-saving treatment to be developed. Five years later, Reito awakens and learns that while he was asleep, the world was struck by the MK (Man Killing) Virus that caused the death of every male human in the planet, except for around one million survivors put in cryostasis before being infected. Much to his surprise, Reito learns that he is one of five males in Japan who somehow developed immunity to the MK Virus and is forced to take part in a reproduction program to ensure humanity’s survival.
