Prince of Tennis and Hunter x Hunter Crossover Challenge

Just finished reading Prince of Tennis, and am already working on a story of my own for it (it's called A Style All Their Own, it centers around some of my own characters who I tend to use for everything, it might end up in the crossover section with Percy Jackson, be on the lookout). I've also watched the small bit of Hunter x Hunter that's on Netflix. I found a funny little one-shot about Killua drinking Inui juice in the Prince of Tennis section and thought I would be cool to see more. Sadly when I clicked over to the Prince of Tennis crossovers there were none for Hunter x Hunter. I'd write my own, but at the moment I have no idea what I'd put in it. This challenge will hopefully get more writers interested in the possibilities of this universe.

Dos

Killua must be the main character.

He must join the Tennis club of one of the schools (preferably Seigaku).

Gon must be included somehow.

Killua and any other characters from Hunter x Hunter must willingly drink Inui juice at some point.

Killua thinks the juice is actually pretty good and asks for more and/or the recipe (double points if it's something like Blue Vinegar and even Fuji can't stomach it).

Takes place during the manga, not before or after.

Must be well written, that means correct grammar, capitalization and punctuation (my biggest pet peeve is when I find a good story without these).

Tell me through a PM if you're going to take up this challenge, I'd like to know who so I can list takers.

Don'ts

Keep it out of the Hunter x Hunter universe, as much as I like it, it won't really work in the vague idea I have.

Avoid making OCs the main focus, they can be there and be important to the plot or even commonly seen background characters, but don't have the narrative follow them around.

The Prince of Tennis universe cannot just be another part of the Hunter x Hunter world, be as creative as you want with how they end up the Prince of Tennis Universe (if using Alluka as a character, you can make it a wish of some sort).

No randomly completely taking away the Hunter x Hunter character's nen, it's an internal energy and as such cannot disappear just because no one else in the universe can use it.

Hunter x Hunter characters can't just know how to read and write in Japanese, that's lazy, so at least make some mention of them having to learn.

Feel Free To

I kind of want to see Hisoka show up just to mess with them at some point, but I know it isn't everyone's cup of tea.

Throw in mentions of the Hunter Exam in comparison to tennis.

Any pairing you feel like or none at all, I don't care.

Basically anything not on the Don'ts list, as I said, I have no idea what I want to see in the story. Have fun with it.

Takers