You and your boyfriend, Killua, recently discovered a blue guitar that you found while defeating some random bandits, Killua and you, as curious, quickly picked it up, it was a special guitar, after all it was a Nen user who was using it before so you two quickly became interested, It was also a very expensive model

you two arrived at the nearest inn and checked in, without even waiting, Killua changed his clothes to more refreshing ones and sat on the bed, picking up the guitar

"Man, I've never played a guitar like that" Killua says eagerly, he's never had the chance to play one of those things, so now it looks a lot cooler, his fingers delicately passed over the strings of the instrument "I want to make a really cool noise " he chuckles