The Second Personality Has Something to Say [Quick Transmigration]

Tang Xi discovered that she'd somehow ended up inside someone else's body. And they were both living in it at the same time!! What should she do? Would they try to exorcise her?! Tang Xi decided to pretend she was the other person's second personality and just try to survive in the cracks. But... Seriously, did she eat your rice or something? You're really that bored, getting involved in whether someone has split personalities or not? And you want to kill the other personality, too! Also known as: I'm Everyone's Guardian Spirit.