As Reito begins to adapt to this new, man-less world, he finds clues that the virus was artificially created.
Why would you think that?
Wie kommen Sie darauf?
¿Por qué lo piensa?
¿Por qué lo piensa?
Pourquoi le serais-je ?
Perché pensa questo?
Por que pensa assim?
Откуда такая мысль?