Hogwarts: I Just Want to Study Magic

Dipper Pines is an orphan living in the Muggle world. When he was eleven years old, a letter from Hogwarts changed everything - but what arrived before him was an intruder wearing a white mask. He was forced to climb onto the roof and write a letter in blood asking for help in the rain. When Professor McGonagall arrived to repel the intruders, he escaped safely; even after successfully entering Hogwarts, Dipper found that everything was not as smooth as imagined. Whenever he tried to make changes, there was always an unknown force trying to reverse things back to the original timeline.