They are Senior-Junior They are P-Nong They were Cat-Dog once They are FirstYear-HeadHazer They are neighbour flat They in Best Friend relationship now....for now ?

You & Jungkook despise each other. It wasn't fair that someone with a cruel personality had everything-enviable grades, ideal physique and wealth. But what if one day, you learn that Jungkook took his own life? Would you be willing to make a deal with the Devil to relive the past 28 days and prevent Jungkook's early end? [COMPLETED] Inspired by "In 27 Days" by @HonorInTheRain Credit for cover: @btsilyy