I really liked the characterization of Sirius and Lily here, especially Sirius accepting help only once he sees Lily's vulnerability. I also really liked the little pieces of quirky characterization like "Old Sluggy" which made me smile while reading it. Your writing style flows very well with the characters you picked and you incorporated the object of the Potions book very smoothly, which is hard to do. The turn that you took on begging wasn't something I'd thought of before, and I was worried that it would turn in a more sad direction but I liked the way you went with it!
One thing I noticed at the beginning is that you tend to start sentences with the same word or fragment, i.e. "The" or "It landed". It doesn't impair the reading, of course, and I loved this story because it's so sweet but just something to consider next time :)

That was great! I loved it!

This was so enjoyable to read!
I love how you portray Sirius! I've never seen him written like that but I so enjoyed it! Seeing him be sad and nervous was sweet and Lily helping him is just like Lily! You did a terrific job displaying Lily's fear and compassion.
The words and descriptions you used were absolutely incredible! They drew me in. The way you strung the words together was wonderful. You we're very creative when writing this and you used the prompts great. It was really creative and the way you showed Lily begging to stay with Sirius because of her fear was really sweet.
The story flowed wonderfully with no odd discrepancies and the ending when he gets his essay back flowed perfectly with the rest of the story. Well done and I hope I get to read more from you in future!
From fellow writer and competitor, NinjaDevil2000