Lessons in Sin

He was the kind of man every girl whispered about, but never dared to approach. Professor Kim Taehyung-cold, unreadable, married. He ruled his classroom like a dictator, with nothing but numbers and silence as his allies. No one spoke in his presence.

But then came her.

She wasn't loud, wasn't trying to seduce him like the others. She sat in the third row, always early, always quiet, always lost in her notes.
And that's what made her dangerous.

Y/N didn't chase him. She didn't even look at him.
But something in her presence awakened a hunger in him-deep, forbidden, and utterly uncontrollable.

He was a husband. A father.
She was his student. Twenty, pure, untouched.

And he was about to destroy them both.