You should read "I'm the main character's little sister" FL has 3 older brothers and each one is a different manhua trope. Time travel, demonic possession, and soul swapping. In an age where people have become 'awakened' one alchemist woman tries to keep her family (and her sanity) together.
The swapping of souls. Mana stuff. Reincarnation stuff. I have never been so confused in my life.