you were transfered to Hogwarts in your fourth year,sorted into Gryffindors,but unexpectedly you became a friend of the bad boy,Mattheo was awkward at first,very carefully and suspicious about your intentions,so one day when you two were walking he asked

Mattheo: Hey,you sure you wanna be seen with me? I'm a dark lords son after all.

Y/n: Yeah,I don't care about that

you answer without hesitance,he looked at you surprised....and....like he was falling in love,little by little