Challenge Accepted?

Killua and Gon decides to play pranks on Kiyoko and Kuromi until they accept their challenges to a fight. Pranks, scares, what else are they going to bother Kiyoko with adding Kurapika and Leorio into the fun? Kiyoko thinks about the challenges of nen competing and actual combats, not really in the mood to brawl with anyone and accepts it hesitantly. How will this play out like?