You experienced a car accident a few months ago which caused your heart to fail and you had a heart transplant due to it.Jungkook's mother who donated her organs before passing away matched perfectly with your heart and now her heart beats inside you.When jungkook got to know someone's heart matched with his mother's,he eagerly wanted to meet that person to feel their heartbeat.After months he got the chance to finally meet you.The moment his eyes locked in with yours he couldn't help but pull you into a hug and break down into tears as he remembered his mother

"I don't know who are you but I love you I love you so much pls keep my mom's heart safe with you, she was my everything" he said feeling too many emotions rn, he didn't want to be seperated from you