I can't understand a single word from this description but I feel it will have love triangle or stupid ending…
Basically FL is looking for her missing biological brother in her world and accidently enters a parallel world and meets ML. He wants to take her as his sister, but when story progress we can see he slowly falls for her romantically but is not aware of it. The SML is her bio brother so no love triangle. In this parallel world her bio brother is the demon King, ML's rival. So everybody thinks she is bad too.
As Chinese dramas do not use time travel, I feel at the end, it will be a game, someone dreaming or writing a novel or something like that like most of other similar dramas. On a side note, I hope FL stays away from her ex