He is livestream in his office and you are sitting next to him but you don't appear on the screen because you two are secretly dating. He was happily replying to a fan comment when suddenly some fans noticed a red mark on Namjoon's neck and asked him, that is the hickey you made last night, he read the comment

“Fan 1: Namjoon ah, what's wrong with your neck?”

“Fan 2: Namjoonie, why is your neck so red?”

He’s looks at you and smirk