Loki Odinson and the Prisoner Of Azkaban

Loki returns to Hogwarts for the third time, with more serious intentions than before. Even he learns secrets about himself, and also about the fabric of time. Certain things he already knows... does it make him question others? Those who didn't put in as much time and effort into his schoolwork as he did over the summer...
A new point of view is revealed- read from Hermione's point of view on what she thinks of Loki's demeanor.