Okay so I first read this fic several years back, and I remembered it recently and spent like three days looking through the OP/HP crossover section looking for it again and I found several other gems along the way, but I can't over the raw potential this story has.
I can't wait for this to reach the Baratie arc. I can see Sanji getting along pretty well with Harry and striking up a quick friendship, and him either being surprisingly good friends with Draco or the guy pisses him off second only to Zoro because of how he interacts with Nami.
Some of the other reviewers commented that it may be difficult for Harry and the others to keep up with the Strawhats and other characters in terms of strength as the series goes on, and while I can see that being a slight issue, I definitely think there are ways around it. Harry and the others could use old spells in new, creative ways, they could use spells that they normally wouldn't because "these spells are for dire circumstances," they could take to training themselves physically and it makes their magic more potent (physical fitness and activity playing a role in magical strength is a huge headcanon of mine), they could take up a nonmagical fighting method and incorporate magic into it, learn newer and more advanced spells or even invent spells of their own. Those are all ways I thought up off the top of my head, and I'm sure there's endlessly more ways to go about it.
I think that Harry revealing the reason that he and the rest of the D.A. came to that world might cause a bit of a problem with the crew, at least momentarily, because if Harry's there in search of a specific person, does that mean he'll leave the crew once he finds Sirius? While Luffy's the kind of guy that would support Harry and offer his help at every opportunity regardless, because they're friends, I think he'd be sad about the thought of it for a while.
That's all I can think to say at the moment, and it's getting late here, so I will sign off, and I wish you the best. Stay creative, and feel free to send a message, because I would love to talk about this story in more detail.

Man, I hope you get back to this story, it's simply amazing!
I hope this story won't be dropped, its simply to interesting!

hahahaha! SO hilarious! i love it

Pity it seems unlikely to ever be added to, but I'll keep an eye on it just in case. It's so hard to find well-written crossovers.

Amazing! I absolutely loved it! :D I had so much fun reading it! I do have a few questions though:

Why doesn't Harry or Draco use any healing spells to heal/alleviate atleast the worst of injuries? They just came from a war, and Harry just spent a year running around the country and fighting, and they must have learned some healing spells along the way, so it's not like they don't know any spells.

How come the lot seems a tad unprepaired for the journey? They seem to have no first aid/survival kits with them (basic potions, food rations, clean water, emergency stuff) from what we can see. There is also the fact that they have absolutely no method of contacting one another. One would think that they would've anticipated at least the possibility of getting separated at some point of the journey. They are exploring the possibility of traveling to a whole new world. You'd think they'd be prepaired. Didn't the things they tried to bring with them survive or...?

But maybe I'm just overthinking things. I tend to do that sometimes. Anyway, I really did love reading this and I'm looking forward to the next chapter! :)

This is the story concept I've been looking for all day! Or, at least some of it. I was thinking I'd have to write my own but other than having Harry go through the Veil to find Sirius, and meeting Ace, Marco, Sabo, and Luffy I really have nothing else. I haven't event figured out if anyone else goes with him. but this has given me some major ideas.

writing.

More please! This story is fun,

Geeeze, I hope Nami tells them about her problem so that they can deal with it sooner! haha
Neat story. I wonder who they'll find next? :P
Too bad this story seems abandoned- but I can hope! Haha

:P I also find SuperPowerfulCharacters tm without AVeryGoodReason tm to be pretty annoying, and rather weak in actual character... xD
I like this story! :D

Ppffft- poor draco, it's gonna get a lot more annoying than that, buddy... xD

Hahahahahaha! xD They're so funny...
And of course, the ol' one piece humor- Dia Mond, a rather idiotic fellow... and his weak spot, and everyone else confirming it xD And Harry and Zoro just look at each other xD
Love it! haha!

Draco's going to be mistaken for some kind of dragon-zoan at this rate, isn't he? That could actually be a hilarious side-arc-thingy; if there IS an actual dragon zoan person with some kind of reputation and Draco's mistaken for them because 'there can only be one of a devil-fruit'. Like, he's regularly mistaken for a pervert or a famous bounty hunter or something at some point, and is eventually confronted by the "actual" guy for being an imposter.
...Rambles like WHOA. Anyways, in case you didn't notice, I really love this story :P It's beautifully straight-forward and everything that first comes to mind when I think OPHP crossover. Continue!

ohhhhhhhhhhhhhhh my god this amazing! why isn't more?
I'm like completely hooked on this! I really do hope you decide to continue it someday!

I really hope you continue this story because it's fun to read, I love it and I look forward to the next chapter.

I can't help myself but I think maybe Sirius landed on board with Shanks, it wouldn't be impossible for his luck to land on the same Ship as Shanks.

Regards,
Lunary