You are friends with Mattheo Riddle and Draco Malfoy, the younger of both pairs of siblings

One day, when you are in potions class, Professor Snape announces that you will have to work with the oldest students, from the last year- the door to the classroom opened: the seventh year students walked inside

You recognise two of them- Tom Riddle, Mattheo’s older brother and Corio Malfoy, Draco’s older sibling