As Reito begins to adapt to this new, man-less world, he finds clues that the virus was artificially created.

As Shouta adapts to his new life in the all-girls school, he starts to wonder why everyone is so eager to be friendly with him...

Reito finds clues leading to the origin of the MK virus. He also finds out that anybody who researches the origins of the virus tends to go missing quickly...

As a messenger from UW's global headquarters arrives in Japan, Reito finds the secret behind the creation of the MK virus.