Time Travel with Many Men and Few Women, Falling in Love with Money

(It's a boring article, written by myself because of my madness. The characters and plot are very messy, so proceed with caution!) As a time traveler, something is bound to happen to the protagonist. Sweet love doesn't matter, weird things don't matter either. In a sense, if others use the body of the protagonist, it can be regarded as a rebirth novel. (Obviously, the label also has interstellar, but, I'll write about that later, I don't know how I chose the label at the time)