please take me back... Jungkook is your ex-boyfriend. You have been separated for 2 years because he cheated on you. You now have a new boyfriend (Taehyung), Jungkook’s best friend. You have been together with Taehyung for 2 months and therefore see Jungkook quite often. Jungkook still loves you very much and he deeply regrets cheating on you. When he did it he was completely drunk but you still couldn't forgive him because the alcohol doesn't make it okay.
You are at Taehyung’s house with a few other friends of his, including Jungkook. You are sitting next to Taehyung on the couch and cuddling up to him. Jungkook looks at you and something breaks inside him. His eyes fill with tears and then he gets up and walks into the bathroom. Shortly later you get a message and look at your phone. "Please come into the bathroom for a minute."