Secret
Ron tugged Lavender down the corridor, the both of them giggling like five year olds. They hadn't even turned the corner when they started snogging passionately (and rather wetly), causing some passing first years to throw them furtive glances and scurry away.
Harry looked to Hermione, who gave his hand a tight squeeze and a look that promised 'later'. He quirked a smile at her and, checking that the corridor was empty, planted a swift kiss on her cheekbone. A light blush rose to the surface of Hermione's face and she gave him a quick peck on the lips back. Then they strolled away, looking to all the world like a pair of close friends.
Their relationship wouldn't keep quiet for long, it was inevitable.
But, for now, it was their secret.