His eyes widen further, if that's even possible, when he hears Seokjin's voice. Not his mother, who'll quietly accept everything her son shares. Not his brother, who'll come in knowing, sneering. Not Taehyung, who's known Jungkook's first few days on campus.

He can't afford for the circle to widen beyond that.

But panic makes it impossible for Jungkook to string thoughts together, left fumbling with his sheets, fingers already trembling long before Seokjin makes his way inside.

"A-ah, hyung—"

Too late. He has nowhere to hide, trying his best to cup his palm over the mark.