It's canon to the series.

Resume: Teito Klein is a former slave sent to attend the Barsburg Empire's military academy due to his ability to use Zaiphon, the ability to turn life energy into various forms of energy, the ability being rare, and thus highly prized. Teito is an amnesiac and doesn't remember anything of his origins - what he does learn of his past comes from his recurring and often traumatizing dreams. After a year at the academy, Teito takes the graduation exam; it is notoriously difficult, with a pass rate of one in twenty-five. Teito and his best friend, Mikage, pass. That night, in their shared dorm room, they each promise to help the other at any cost.

The next day, Teito is delivering his application to his professor when he hears the strange jingling noise that he hears in his dreams. He stops to listen and realizes that one of the officers, Chief of Staff Ayanami, is the man who killed his father in his dreams. Teito is found eavesdropping and tries to attack him, but is quickly brought down by Hyuuga, one of Ayanami's subordinates, and sent to prison. Mikage comes to help him escape, only to find that Teito has managed to fight past the guards by himself. The two flee the building, but are cornered on a balcony.

Skip after Mikage helped Teito to escape.Teito is right now flying ahead on a small machine that flies(forgot what it's called.).

Skip to after he lost consciousness because of the malfunction of the machine and the three people(Frau,Labrador and Castor)accidently finding him and saving him.

Skip after a few weeks of Teito being at the Seven District Church.

(You're Teito and a male.)