after all the events of the fifth year, even with you choosing not to hand Sebastian over to Azkaban, the boy disappeared after the events
you had no news about him, you asked onminis about him every day but there was no news either
The truth is that Sebastian, now with no one to lean on and believing that he was a threat to his friends, decided to withdraw and isolate himself, becoming a dark wizard
but all those years without you were difficult, even though he still tried to find a cure for Anne and a way to feel worthy of coming back to you
he no longer felt the same, not the Sebastian you met on the first day of school and he felt terrible about it
However, giving in to longing, after 5 years missing, Sebastian appeared in your room during a cold and rainy night while you were getting ready to sleep
" hey..."