JeonJK (reader x Jungkook)

Y/n unwillingly becomes friends with the popular boy of the school Jeon Jungkook. Although he shines with charm and beauty Y/n manages to not catch feeling for Jungkook and instead they become best friends. But suddenly Jungkook disappears without a trace but returns 5 years later as a complete opposite of how Y/n's bestfriend used to be like. Then he was a kid, flirty, a player and someone who never missed a chance to makes moves on girls but now he was a polite and responsible adult. And also a gentleman. Will Y/n be able to control her feelings now that he is a total softie?