it's all because Jin gave him that nickname . Jin was the one who used to call him Kookie,.. until he called him JK before Jhope suggest to call him Jk which Yoongi said stands for Kim Jungkook. don't forget Jimin also used to call him Mr. "Jin " Jungkook , which I find so clever as being aware of the big ship kept on claiming the fact that JKim Jungkook can own by two more ship which is Namkook and Taekook but the way Jimin assure it was Jin. wow!

again it won't hurt day J is my sure names initial or J is my names initial but he said J is from JK.. anyway tattooing an initial on a ring finger is a very meaningful way to express your love and commitment to that particular person who owns that initial. a real wedding ring can be lost but a tattoo on a ring finger means Permanent!
and Jk is too expressive about his feelings! 💜💜💜
#bts #kookjin #jinkookmoments #jinkook #btsarmy #jinkookbts #seokjin #jin #jk #jinkookedit #jk #seokjin