Y/N is your name.
Black is your middle name.
L/N is your last name.
O/N is your family owl name.

Book 3 : Prisoner Of Azkaban

(RECAP!)
You are Y/N L/N a half-blood student at Hogwarts school of witchcraft and wizardry.

In your second year it only proved to be even more adventuress than the last year. You, along with your friends, discovered the Chamber Of Secrets and the belly of the beast that laid slumbered in its den. Shortly after it became apparent, shockingly that Voldedmort, who used to be Tom Riddle, revealed to you that there's more to your family than one thought possible.

It came to light that Maria L/N, a complete anomaly in the wizarding world, is in fact related to Voldermort via their family ties of her mother and of course, the Black family. Her being half sister to Sirius Black. While Maria's mother, Elizabeth being Tom Riddle's (Voldermort's) sister. That being true, Y/N has connections to the Riddle's and the Black families.

(What a fucked up family tree that is eh?)

Though when you couldn't think it could get any worse, a far more furious beast unleashed, a beast inside of you.

Revealed by Dumbledore, it turns out that something deep and dark was hiding in you all along, a Descendent... (One of a kind) A living nightmarish and terrible predator trying scrap its way out of your very soul. With this new found knowledge and curse, Y/N will struggle throughout his third year, only time will tell if he has the courage to see the year through or perhaps someone else in the shadows may just wish to speed up the process...

Friendships and loyalties will be tested in this year, but will Y/N have the will, the strength, to keep them afloat, or will all his hard work come crashing down around him?