Park Jimin died in tragic accident that lead him to death. He had regretted something that he never did in his life. By confessing his first love and friend name Jeon Jungkook, now happily married to a beautiful elegant wealthy lady. 

He met system and transmigrating to his parallel himself, to different worlds. His mission is to change the life of Parallel Jimin from Bad End to Happy End. But he had a problem and that is a parallel Jungkook. He can't bear to fall in love as he love one and only Jungkook in his world. What will he do? Should he ignore his feelings to different Jungkook or not?

Jimin had to finish the mission or worse his soul won't reincarnate to a new life but he always being chased by  Parallel Jungkook TT□TT.