A fire destroyed the Song family and made him unable to see the light of day again.
The words "Wait for me" became his obsession to stick to the world
One thought, and the soul is scattered across the sea
A big dream, the past is like smoke
He is a blind butterfly, flying by, leaving only a short period of time for people to watch in the gap of time.
Probably a double ending
(There is no logic, don't delve into it, the writing is scummy)
Motto: After darkness there will eventually be light