Giving high school essays a Marauder twist, this fiction is centered around the idea where some seniors in high school are require to write a letter to incoming freshman before they graduate. At Hogwarts, seventh years are given a similar assignment to write such a letter for the new first years. Sirius decides to actually take an assignment, well seriously...sort of. He decides to look back on his entire Hogwarts years and write down his list of things not to do at Hogwarts.