AN: This story was actually an idea called the Youngest Assassin where Nagisa and Bruno(my oc) were the first and second youngest assassins but I didn't have much of a storyline so I decided to make it a crossover with KHR after I got an idea from Assassins of the Mafia: A KHR and Assassination Classroom Fanfic by FullmetalMafiaBoss, if you've read it is clear what that idea was. Anyway without further ado, the story begins....

Yuni

As Yuni cried next to her mother's corpse a glow flickered around her neck and she looked down at the piece of pacifier that the glow originated from.

"Where's the rest of it?"

Bruno

*Bam**Bam**Bam* The sound of fists hitting a punching bag resonated throughout the room. A burly teenager hit the bag with strength and confidence, a smirk alighting his face as he gave one last punch to the bag completely ripping it off the hook. He ran a hand through his flame colored hair.

"Haa another day, another bag." He said, sighing contently as he drank from his water bottle.

"What's this?" He questioned noticing the glowing ¼ pacifier that mysteriously appeared around his neck.

"Where's the rest of it?"

Nagisa

A small boy slit his target's neck in front of an audience that the man was giving a speech to, he slipped away completely unnoticed as chaos reigned throughout the room. With a smirk he disappeared into the hotel nearby to clean his knife.

"It is done." He told his employer over the phone as he changed his clothes back to the ones his mother forced him to wear.

"I know, your performance is amazing, so daring. Anyway I already put the money into your account. I have no more missions for you at the moment, so you can rest. I'll contact you later." His employer replied, chuckling at the start.

"Hai, sir." The boy hung up before putting on his choker and noticing the 1/4 pacifier around his neck.

"What's this?" Nagisa questioned fingering the piece.

"Where's the rest of it?"

Tsuna

The final boy with wild brown hair sat at the assassin's bar in Tokyo, waiting for his employer. He smirked, noticing the other assassins clearly underestimating him due to his small size and age.

His employer walked in and sat next to him, causing the other assassins to widen their eyes in recognition and back away.

"Lovro." The boy greeted.

"Cielo." Lovro returned before handing him a file.

"Another slave dealer? Huh, they seem to be increasing no matter how many I put down." Tsuna said, looking through the file.

"Yes there seems to be another one starting up in Hiroshima, and he's the one that's been picking up children for it. Please interrogate the man for information on the base before you kill him." Lovro said.

"Hai, I'll get right on it." Cielo agreed before leaving the bar. The moment he left he felt a weight on his chest, he looked down and saw the glowing 1/4 pacifier.

"What's this?" He questioned as he lifted it to see it better.

"Where's the rest of it?"

AN: I was going to say something here but I forgot, anyway next Chapter: Troublesome Discoveries