Jungkook is an alpha and you are an omega, you're in the same school and your smell is affecting other alphas because you're so close to getting heat.

Your scent is normally very nice and unique, now it's intense because it's very noticeable, while Jungkook has been in love with you for a long time, it's pretty obvious to you but you don't notice.

You and Jungkook are a little too close friends at school, and you're both pretty popular

"Are you close to getting heat?"