Mattheo and you used to be best friends during your childhood. But one day, when you were around 6 years old everything stopped. Not because you two argued but because your parents needed to escape Lord Voldemort, his father. So they decided to move to another country. Your parents didn’t warn you about it so you never have been able to properly say good bye or tell him you were leaving.
Years later, you decided to come back to study at the British wizarding school, people were talking about, Hogwarts. When you arrived, you did the Sorting Ceremony, and now you were walking in the hallways to go to your first class. When you saw a group of Slytherin students, in the same year as you. More you looked at them and more one of them looked familiar. You finally recognized him, he indeed grew up but it was Mattheo.