'It' is Ling Qi. Yes, it's a zombie.
Ling Qi has been having a dream since he became self-aware.
Zombies don't sleep.
But it knows that it is a dream, a dream that goes deep into the soul.
It thought that it might be because of this dream that it escaped being turned into a pile of carrion again and again.
Because it knows.
It has been waiting for a human.
Waiting for the human running towards me calling "Ling Qi, Ling Qi".
The human who scolded it for being clumsy.
The human being who was smiling even though he was crying.
But where am I now?
Can I still wait for you?