is this a sequel? should I read something before this?

It is a sequel, the story before it is called poyun. Its not completely translated yet and the manhua is in the authors other work section (=・ω・=)

You don't Rally have to read the other story first.
They don't have connection yet don't know if that's gonna change in the Future but for now it's like that.

Really*

thank you! I appreciate it :)