Just when I was getting into this story, you make everyone gay. Bloody annoying

Lion King came out in 1994. Just saying.

WHY?

I think this is really well done. I am enjoying the plot and the mystery behind it all.

Quite amusing poor Siri, like the boys I am chuckling and grinning and LOL...

Suddenly Life on Mars

This is fun. More please.

the use of Neville as a sounding board for your plot idea and hooks should work very well all in all a nice update

well now, a very well written Hat, spot on and a nice twist

A very good use of wand jokes when a chapter make the reader grin it a winner now good chapter length it has a start a middle and end which is nice to read
All in all this chapter has a good balance both inward thought inward and outward talk lwhich is good for story development
this is a good way take on setting up the friendship on the train
Now I sorry to say that some subject will put reader's off your story and slash is one of these subjects so I would suggest that keep it non graphic as graphic slash can be offence to a lot of reader as many other 18 or adult subject can be as well
This is a nice update

Surprised they didn't just cast a spell to repair the mugs.

good balance between move the story forward the shopping trip and character backgroup / history all in all a good update

It nice to see a story start, to me the test of fan-fiction is for the story teller to start with canon, then to go beyond it and by so they then create a new story there own story.
Your story start show some creativity as a writer, in the way you written it, ie your words, but the plot hook is old and well know (story rec Story rec. Back Again? Siriusly? by Manchester) now with time travel a.k.a the do over
You will need to think about the changes that will results from this re-do i.e. the "why" the "how" the "what" this will change or effect and how will this change now it is how you develop this that will be key to your story and your take on JKR Harry Potter
thank you for your story start