When worlds cross and protagonists unite, a short challenge turns into a meeting of some people you likely have heard of. Not only is Killua skateboarding, but the sewer water is becoming sentient! A Boy-Who-Lived has a broomstick! A mysterious definitely-not-a-slime is breaking all the laws of everything! It's rare that I get a chance to do this so I gotta make the best of it. ~Author-chan