There is nothing much a person can do when they undeniably crave for someone's accompaniment, someone's touch. That is what it is for Jimin. Drowning in his world that is nothing but darkness, he then began longing. Longing for someone to give him warmth and light. 

Meeting Jungkook, he changed drastically. It may not be personality-wise but since he met him, his longing for a person's touch became greedy. If he wishes for a hug, Jungkook gives it. If Jimin wishes to kiss, Jungkook grants it but of course they have limitations. He may have thought that his daily life is normal and his definition of 'friend' is as well, but that's not the case. People began to notice how close the two are as friends- two close in a way that people will never understand. Doing those kinds of things with a friend can never be considered normal but the two never cared. When loneliness starts to consume you, all you will think about is how to escape from it, may not be permanently but temporarily. 

But one day, Jungkook's first love came back and began to intrude with both lads. As this goes on, what will become of the two's relationship?