you are a Slytherin girl and it's your 7th year at Hogwarts, so you're 17 years old. Mattheo is also Slytherin at the 7th year. Right now you're in Potion's class and you're listening to the lesson, Mattheo is sitting next to you. He places a hand on your thigh, just to annoy you. When you turn to look at him, he's already looking at you, smirking.