"We often doubt the existence of things until someone gives us a reason not to."

If there were a list of things Kwon Iseul (you) didn't believe in, there would be exactly three things on that list: 3.Destiny, 2. A second chance, 1. Love. To you, the three were superficial, unimportant distractions that you could live without and didn't need . And you had vowed not to believe in these things for the rest of your life. 

That was until you met Jeon Jungkook, your new neighbor who makes you wonder why you didn't believe in them in the first place.