You and Mattheo didn't know eachother at all, Mattheo had a 'girlfriend' it wasn't really hes grilfrind, but they hooked up a lot. He was a bully and Voldemort's son, most people feared him, but girls usually adores him.

He was in the corridor of Hogwarts with his 'girlriend' and some guys who probably was hes friends.

You were in the library reading before getting out. The library door were in the corridor of Hogwarts, you got out and walked threw the corridor still reading your book didn't really focus on the other's, you looked up from your book for a moment and got an eye on Mattheo, he was already staring at you. Before hes 'girlfriend' pulled his face away from you and kissed him. what do you do next?