Taehyung struggled with having two jobs. Working full-time at a cafe while attending college and studying business was difficult to balance. It was also difficult to run a fansite and to keep up with Jeon Jungkook's every move. A single image of Jungkook could earn him thousands of dollars. His fan-site was the most popular, but he despised Jeon Jungkook's guts. He despises wealthy people because he believes they are entitled and arrogant. So when he runs into the arrogant celebrity, they argue about whose life is easier, and the only way to decide who's life is easier is to switch lives for a month. That is precisely what they did.