You were at one of Junkooks concerts, holding up a sign that said "JK, WASSUP BRO! "

He noticed ur sign and chuckled as he pointed at it

After the concert Jungkook was walking with his bodyguards as he noticed you in the crowd and called you over "Heyy! Wassup!" He said back smiling as he shaked your hand and fist pumped you. He gave you a wink and a smile

You noticed something in ur hand. It was a little piece of paper that said "Call me." with his phone number written on it