Why me? (Bnha HxH crossover)

Why did it have to be riddles?

Killua's POV

"Today you all will be picking a class president," sleeping bag announced exasperated. 

Everyone burst out out at that, for one reason or another. Doesn't being class president mean more work? I will never understand these people...

Ultimately, it ended up to a vote. Courtesy of four eyes. 

We were told to put a name on our paper. Did I? No. I put a triangle of my paper, which makes it invalid. Inside of the triangle I put a ":P", since I really don't care. 

Most people ended up voting for themselves, mine was the last one to be picked. Sleeping bag did not appreciate my sense of humor. He looked right at me. He knows it was me.  

"I believe we know it was Killua's, but who is it for?" Pinky asked.

"It's invalid," Sleeping bag replied, still glaring daggers at me. I reply with a glare of my own, he's not going to intimidate me.

Apparently, broccoli won with creator as his right hand woman - whatever you want to call her. He seems very surprised at this for one reason or another. 

"What?! Who voted for sh*tty deku?!" pomeranian belted.

At this, rosey cheeks looked away whistling. She's obviously 'guilty', as well as four eyes. Well, I'm assuming four eyes voted for broccoli. He seems like that type of guy.

----I'm a line break! ^-^----

I was eating lunch when a siren went off, it was the alarm for an intruder. Everyone was going one way, and I was about to follow when;

Don't follow them, turn around and go to the teacher's lounge  

"Great, you're back," I mumbled, but I do as the voice told me.

I went to the teacher's lounge and found a guy, well black and purple figure I guess, in the lounge.

"I've been expecting you, Killua Zoldyck," the figure, who now that I look closer has shadows surrounding him.

"Who are you?" I ask, with venom and bloodlust behind my words.

He jumped slightly at my tone, causing me to smirk. I was glad I could unnerve the guy. "I'm Kurigiri, you may see me in a few weeks. In any case, I'm here to propose a deal," he explains.

"What deal?" I question, dropping the bloodlust only slightly.

Shadows  eased up a little at the slight drop, but this guy wasn't out of the woods yet - and neither am I. 

"The mastermind of my group has taken interest in you," 'Kurogiri' starts, probably wondering if he should continue.

So I give him the go ahead, "Go on".

"He wants you join our villain group," he finishes.

"No."

"Why is that answer to come so quickly, because we are a villain group?" the guy questions, he was playing a dangerous game. 

I stay silent, debating the question. How I should answer if I am to answer at all.

"Remember Killua, in every light there is darkness and in every darkness there is light," Shadow man says, interrupting my train of thought.

"No riddles. I hate riddles." I added even more murderous aura to my nen. 

Shadow notices this and, cautiously, continues, "It's not exactly a riddle. I'd say it's very straight forward. Our group has a reason for being, what society calls, 'villains'. You could also be called a villain, don't you think? With that kind of body count over your head?"