Jungkook joined a office as web designer, he can't speak but everything well, there he heard his office colleague mocking him cause he's mute and he's dating you, they said what you see in him that you're dating him, and that's why he came back home early and locked himself in his room, you tried to talk to him but he didn't open door and you saw him talking to you in sign language from his window

Please go, you deserve best said in sign language