It's Just a Book, What Are You Afraid Of?

Was it an ordinary thing on earth? The two brothers and sisters also joined the army of time travelers one day. What the two did not expect was that they were sealed in a book that could not be destroyed and became the sealed spirits in the book. Fortunately, there was a puppet seal in the book, and the two were able to see each other again. Good news: puppets are flesh and blood just like real people, and can change their appearance according to their wishes; Bad news: this golem can only hold one soul; Better news: The souls in the puppets can be switched at will, and the two cannot be promoted through practice; Even worse news: there is no way out, and you need to personally record historical events to advance. Let's see what kind of disturbance two souls with completely different personalities and mutual attachment can cause in this alien world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.