Jungkook is an android, he doesn't have a heart, but that doesn't mean he doesn't want feel love.
Taehyung is human, he has a heart, but that doesn't mean he knows how to feel love.
Every time he gets a chance, Jungkook would always ask his creator, Taehyung, for a heart.
So, one night, Taehyung makes what Jungkook is asking for.
The next morning, Taehyung hands Jungkook a metal heart. "A heart made of steel will never let you be hurt." Says Taehyung.
Jungkook shakes his head, and tears were falling. It's artificial, Taehyung knows, but he programmed those tears to be shed only during sadness. "Why are you sad?" Questions Taehyung.
"I am not sad." Jungkook shakes his head again, a smile is visible through his tear-soaked face. "When I said I wanted a heart, I meant you give me yours. Learn to love. Learn to love me."