"Sigh now, walking alone under an umbrella, lonely shadows can't be in pairs" comes from which poem?

It's not a poem, it's from the TV series Cyclone Girl 2 episode 14.

Fireworks ten miles, the world of mortals.

Can't hide the hero's tears, the beauty is sad.

Looking back, we looked at each other.

Sigh now, a person walking under an umbrella, lonely shadows can not be paired.

Looking for it, it is sad and sad.

Wandering Jianghu, cosmopolitan, dream girl, where are you!