Never Let Go~ (KILLUGON)

Prologue

It's been 4 years since the boys last saw each other. Killua, travelling the world with Alluka/Nanika and Gon training hard to get his regain his nen. Both of them have had their share of action, of gruesome violence (I might do a book of action one shots on these later if there's a request💜), which, of course, ended up strengthing them even more. Physically, both Killua and Gon have progressed equally but in terms of nen usage, Killua has gained skills far superior to Gon's. Gon had to start again, from scratch, if not less, but he has progressed at an incredible pace.

Alluka, Nanika and Killua, over the years, worked out a way for her to be able to keep her requests under control. Alluka still cannot ask Nanika for  wishes with as much success as Killua can (she is training to do so though, and lemme tell ya, its working), but Nanika is now trained to restrain herself from requesting unreasonable things from anybody, allowing Alluka/Nanika to be able live independently, safely. Illumi has always been a threat to the poor baby but with the constant build up of 9+ years of training independent of the Zoldycks, Killua has surpassed Illumi in terms of strength, agility, and well, basically everything, so he would think twice before attacking Alluka/Nanika. Along the way, the two encountered things outta this world (not dark continent stuff though), fighting them together increased both their bond and strength. Currently, both Killua and Alluka have been to every city, every ocean and every mountain worth visiting- except one. And that's how this story starts off.

Side note: Alluka had taken the hunter exam at the age of 15, when Nanika began responding to small wishes of hers like teleporting small distances, or controlling elements like fire. Alluka is now a pro hunter, having the ability to slightly control Nanika. Her main power, though is the free manipulation of both glass and fire, as she is a transmuter like her brother.

Enough about Killua and his sisters, let's talk a little about smol-green-bean-hasterriblefashion baby. After talking with Ging on the world tree and after travelling a bit with him (I haven't read the manga so I don't really know what happens after the world tree part gomen💜) Gon decided to stay with Kaito and his friends and improve his strength through intensive training. Everyday, each of the members of the group would give Gon a different task, almost impossible to achieve and he would go through with it (not easily though). He aswell, faced many challenges throughout the 7 years, sharpening and deepening his horde of knowledge and experience.

Both of our lead boys never forget about each other though. They are like the little bird in a coo-coo clock in each other's minds, popping up periodically, leaving a reminder that someday, somewhere, they would meet, and never let go again.