HP: Life in Hogwarts ( SI OC)

You know the drill, a college student woke up as 11 year old Callum Haven, he founds out he is in Harry Potter universe. Read as he traverse through magical society as a muggleborn orphan. This fanfic will be a realistic approach based on the seven books and not on other fanfics and fan theories. MC won't just get lucky and have special encounters like some other fics.