While I am walking to school one day, I was knocked down by a car. All of a sudden, I realized that I have travelled back 6 years ago. Not only that, the body that I am in does not belong to mine. Concidentally, it is the day when Bts debuted. How are you going to survive this journey? Will you affect Bts's future? What if you fall in love with one of the member? Should you find a way to go back to your own future or stay in this past? The decision is all yours.