Female Channel, the Protagonist Pretends to Be a Noble or a Big Shot, Does Not Subdue His Wits, and Does Not Lick the Dog.

Want to watch something like "Social Animals?" Phew, sister is now the richest man! Book. I once read an interstellar novel with two male protagonists. The male protagonist traveled through time and turned out to be a liar. He could only continue to pretend after time traveling. But later on, it was mostly about falling in love, and there was no drama like this.