Deathly Consequences to Lively Friends

Alastair Aphelion is childhood best friend to one Remus Lupin. Both Alastair and Remus are ready to go to Hogwarts, especially Alastair.
Alastair has felt like he has never had a place in the world, though when he finds out he is half-blood, that all changes. Alastair convinced Remus to tell him how to become an animagus and became an animagus at age 6, only a year after finding out Remus is a werewolf and a year after Remus was bitten by Greyback, forcing Remus to become a werewolf. Alastair is one of the only people to know and accept Remus for being a werewolf.
What will happen when the two of them meet James Potter, Peter Pettigrew, Sirius Black, Kohr Diem, Lily Evans, and Regulus Black?

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All credits go to J.K Rowling with her characters and the story.

I claim credits of the plot, Alastair Aphelion, Lynx Vale, Caspar Acker, Aoife Aphelion, and Nicolas Aphelion.

My friend -Lia- claims credits of Kohr Diem, editing this book, and giving me the name idea (as well as letting me use the name). @Sarcasm077 is her account, please go check her out. Though she hasn't written any books on here.