Loving someone and not having them love you back is the most painful feeling in the world. Or so they say.  Taehyung has loved his childhood best friend from when he first began to understand what love is. When Jungkook learns about his friend's feelings,  which he can never reciprocate, he decides to run far away from him. Bcoz watching his friend suffer bcoz of him breaks his heart every passing moment. When he finally comes to terms with his own feelings, will it be too late?  

He invited him saying "I'd like to spend my birthday with the two persons I love the most, please come." and it would have been okay if Jungkook meant that word, love, as the sentiment between two friends, but he knew that he sincerely loved him, as a lover does.. or at least he did love him sometime in their past. But now? Now things have changed and he was engaged. With a woman.