Jeon Jungkook, maknae of the famous Korean boyband BTS, is falling for one of his bandmate. Caught between his ever so growing career as an idol and his blossoming feeling for one of his hyung, Jungkook is determined to keep his emotion separate from his work.

He can't help but wonder "what if I never became a singer"? On a rainy spring day, a tragic accident during a photoshoot brings him a fateful choice. He gets a chance to live as a normal teenager for a month thanks to the grim reaper with a really bad sense of humor.