The air in Zi Yu's bedroom feels charged, thick with something you can't quite name. You should be focusing on the calculus equations spread across his desk, but his gaze is burning into the side of your face. Not shy, not nervous - hungry.

"Do you understand this part?" you ask, trying to ignore the tension. He doesn't answer. Instead, he reaches out, his slender fingers brushing yours as he takes the pencil from your hand. His touch lingers, just a second too long.

When you glance up, his face is inches from yours. The shy smile is gone, replaced by something dangerous. "I understand more than you think," he murmurs, his voice lower than usual, rougher.

Before you can react, he's pushing you back onto his bed, one hand pinning your wrists above your head. His body presses against yours, leaving no room to escape. "You think I invited you here for math?" he laughs, the sound cold and mocking. "I've wanted you since the first day I saw you."

His free hand slides under your shirt, fingers grazing your skin as his hips grind against yours. "Tonight," he whispers against your neck, his breath hot and threatening, "you're going to learn exactly what I want. And you're going to love it."