"Hello Kakuzu! What are you doing?"

"Tobi. Stop yelling."

"Sorry, Kakuzu."

Kakuzu sighed. Tobi's voice was almost as annoying as Hidan's presence. He hypothesised that if he told Tobi what he was doing, then maybe the masked man would leave.

"I am making, Tobi, what is called a mask. It-"

"OOOH like Tobi's mask! Tobi's the Masked Marauder!"

Kakuzu rolled his green eyes.

"No, Tobi, not like your mask. This mask is like a gag. It poisons my targets on contact. It's a debilitating poison and it only lasts for twelve hours, but it paralyses inside of a minute. It will also allow me to hand in my bounties alive and therefore, maybe get a bonus."

"OOOH, BOUNTIES! Like the chocolate?"

"No, Tobi. Not like the chocolate. Leave me alone. I think Deidara is calling you."

Tobi ran out of the room yelling, "TOBI'S THE MASKED MARAUDER!" and "I'M COMING DEIDARA!"

Kakuzu sighed once again, but this time it was a thankful sigh. He managed another twenty minutes silent working on his new invention until Hidan came bursting in looking for his sacrificial tools. Gritting his teeth in annoyance, Kakuzu glared at the silver haired maniac.

"I haven't seen your pitiful excuse for weapons. Look in the supply closet, that's where all the weapons are meant to be put."

Hidan snickered, deciding to annoy Kakuzu for a bit and lounged on his partner's bed.

"We should put fucking Itachi in the supply closet."

Kakuzu's lips jerked under his own black mask and he ignored Hidan's further ramblings in favour of working. It was only ten minutes later that Hidan stopped talking and looked over Kakuzu's shoulder.

"Whatcha doing, fuckface?"

Kakuzu glared at the wall and turned slightly, getting inspiration almost instantly.

"It's a blood blocker. You wear it when you're killing or sacrificing, and it makes sure you don't get blood in your mouth. It's quite useful for-"

Hidan grabbed it before Kakuzu could finish, and jammed it over his mouth. The crinkle of Hidan's eyes told Kakuzu that he was smirking, but the maker of the mask didn't care. He was going to be smirking soon.

Hidan's voice was a bit slow but he wasn't worried.

"Thanks for making this for me Kakuzu. It's gonna be fucking useful. Bye."

With that said, Hidan turned around and waltzed towards the door. Before he took five steps, he was stiffening. Just as he reached the door, he was completely paralysed. Kakuzu stood up from his desk and walked around the front of Hidan to see his face. He removed the mask slowly, reveling in the panic etched on the silver haired man's face.

"Actually, Hidan. This mask," he held it up for Hidan's inspection. "Is my new invention. It poisons the wearer inside of a minute and paralyses them."

Kakuzu leaned in closer.

"I think I'll enjoy manipulating your body to with in an inch of your life. Then I'll stitch you back up and start all over again. Don't worry, it only lasts twelve hours."

Happy Birthday Kakuzu!