Harry froze mid-step in the corridor, his breath catching as a sudden, searing warmth pulsed through him—low, insistent, impossible to ignore. His knees nearly buckled. Around him, students chatted and laughed, oblivious. Only Ron, walking beside him, noticed the flush creeping up Harry’s neck.\n\n"You alright?" Ron asked, frowning.\n\n"Fine," Harry choked out, gripping the wall. It felt like someone was touching him—everywhere—though no one was near. Just as quickly as it came, the sensation vanished, leaving him shaky and mortified.\n\n"You’re not fine. That’s the third time this week you’ve gone all red and weird in the middle of class."\n\nHarry couldn’t explain. How could he? He hadn’t been touched. Not by anyone. And yet… something had happened to him—somewhere, to someone—and he’d felt it.\n\nLater, in the Gryffindor common room, Lavender Brown giggled while showing Parvati a small, shimmering pendant she’d found in the girls’ lavatory. \n\n"It vibrates when you rub it," she whispered.\n\nAcross the room, Harry dropped his quill—and clenched his teeth as fire raced down his spine.