Jungkook is an inventor who was able to invent the time machine You were his wife before you got cancer and died After you died Jungkook was depressed, he turned back time to prevent you from dying, but every time when time went forward you died again Now Jungkook goes back in time again, to the time of the engagement, and this time he tries to prevent your cancer "baby, we have to go to the hospital today, remember?" Jungkook kisses your forehead, he doesn't want to lose you again