You were in the grocery store shopping for your snack restock. To other people you were just a normal person shopping alone but little do they know you possess the ability to see spirits.

The spirit Jungkook followed you everywhere he thought of you as his lover and would never leave you alone.

So here you were seeming talking to yourself as this spirit clung to you kissing your neck repeatedly. You tried to tell him to stop but you just looked like a crazy person talking to themselves.