A/N: I do not own Death Note or this particularly unoriginal plotline.

Crack, future yaoi.

This is cross-posted at the Death Note kink meme.

http: / / community . livejournal . com / dn_kink2 / ? thread= 823763#t823763

Rated M for later chapters.

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Chapter 1 The Alliance

"Get in the truck! Hurry!" Aizawa shouted to the others as the crowd advanced on them. Aizawa could hear Eriko screaming as a hand grasped the back of the truck and one of those things tried to climb on... and then more of them. Just as the truck was about to be overrun the whole crowd suddenly collapsed.

"Was that... Was that Kira daddy?" Yumi asked in wonderment.

"Oh thank god!" whispered his wife.

Aizawa grimaced. The whole world had really turned to a craphole. His own family praising that murderer!

Even if it was Misa Amane not Light Yagami that killed his partner Ukita... Aizawa could never forgive Kira his crimes.

And what was an even worse betrayal was that L had been right all along.

Aizawa had wanted so much to believe in the Chief's son, but all this time...

But there was nothing they could do about it.

They now depended on Kira for their very survival...

Kira and L.

"L, it's me," Aizawa radioed in. "You'd better open the goddamn gates because we're coming in whether you have them open or not."

"Understood, Mr. Aizawa," L said from mission control at HQ.

The truck that held Aizawa, his family, and several other survivors shot through the barricade just before it closed... Unfortunately so did several intruders.

"Light-kun, we have incoming," L said in his usual placid tone.

"Yes, I know," Light sounded annoyed; surely L could see he was working! "I'm already on it..."

L barely looked at the monitors and focused his attention on Kira, Light Yagami, as his pen flew across the paper adding name after name, the sweat dripped from his brow and he had that crazed look in his eyes that he often got when using the Notebook, filling up pages at a time.

L was brought out of his trance when Light paused in his manic scribbling and shouted at his monitor screen.

"DAMN IT!"

"What's wrong?" L asked with some concern.

"We have several incoming with no match in the system."

"If they get in..."

"I know," Light said through gritted teeth. "Mikami? Do you see them yet?"

The long-haired man was also writing tirelessly in a notebook.

"Yes, my Lord," Mikami clattered out of his chair, "It's kind of fuzzy but I can just make it out..." the former prosecutor's Shinigami eyes flashed red as he pressed up against the screen trying to see their names and then began shouting his battle cry of "DELETE!" writing the names with great flourish.

L breathed out a sigh of relief. "Sensors indicate we're secure. We got them all."

Light sagged in his chair. "A lot of them today. Good, work, Mikami." Light smiled brightly at his subordinate and L felt an irrational surge of jealousy… and didn't catch how he also whispered "L."

L focused on the task at hand, switching back to the P.A. system.

"Mr. Aizawa, could you please escort our newest guests to the infirmary immediately."

Aizawa blanched "We're not infected!"

"Then you have nothing to worry about if the doctors make sure."

Meanwhile Light and Mikami sealed the notebooks away under the compression lock in the desk. This was a scenario that L had never imagined. That he would end up working with Kira...

"Are you alright, Ryuuzaki?"

Light noted how L sat trembling in his chair.

It was understandable. The two of them had dealt with trauma after trauma, crisis after crisis, nonstop since the outbreak began yesterday. Even L must be getting tired...

And then there was the elephant in the living room—L and Kira were mortal enemies.

Just how the hell did they get to be ruling this little world of survivors together?

Well, L supposed in what was left of this crapworld he owned the castle, their headquarters, and was the only one who knew how to work the complex security mechanisms and knew the full ins and outs of this facility and Light owned the big stick, the Death Note… and had successfully managed to keep anyone else from stealing said big stick, by alluding that anyone who owned a notebook was cursed for eternity...

Only one individual was willing to accept the notebook after that, a loyal supporter of Kira, Teru Mikami.

After the loss of Misa and Rem. Light found Mikami among the survivors and had shared his power. Mikami gladly made the eye deal which was good because L's facial recognition software only had so many names in the database.

Light ended up outing himself during the first wave when he used the notebook to kill the hoard and save them… was that only yesterday? Light had saved them. It was either that or die... along with everyone else.

L was quick to point out that Light was Kira (and then several worshippers made themselves known among the crowd) and L became known as L because during the crisis some idiot on his team (probably Matsuda) slipped up when talking to the survivors and called him L...

And Light and L quickly called truce to avoid the survivors tearing each other apart...

It was not like L could arrest Kira under the current circumstances even if he wanted to. There was no system left, it had all collapsed. And at the moment Kira was their only line of defense.

But that was another thing that would definitely have to be addressed as soon as possible... they needed to show some form of solidarity...

All that was left was Kira and L and the survivors that lived in their world.

Kira and L—saviors to the people, bastions of authority, protection, and power in the midst of all this chaos, their law was the only law.

With some effort Light pushed himself out of his chair. "I guess I'll go see how Aizawa's doing..."

"Thank you, Light-kun," L called after him softly, and then added, "Mikami-san" in an attempt to be polite. It was clear Mikami didn't like him very much but he was under strict order from his God not to kill L and (to L's great surprise) to obey him and show him proper respect as apparently "L Lawliet is necessary to help rebuild this world."

"It's no problem," said Light. "I hope he's not infected..."

"Yes, we've had far too many casualties already..."

Watari, Souichiro Yagami, Mr. Mogi, Misa Amane and her Shinigami Rem, Roger Ruvie, Near...

All because Kyosuke Higuchi was a sore loser.

When he was cornered he felt he might as well take down everyone else with him and unleashed one of Yotsuba's secret projects upon the world. This secret project done in consort with several military contractors and a subsidiary company known only as Parasol was a new bioweapon that would allow soldiers to keep fighting no matter what wounds they sustained...

In short... it made zombies.

Unknown to Light and L right before his capture Higuchi had punched a code in his cell phone that would release the virus, though he didn't have time to properly gloat about it as he was killed by the true Kira a few minutes later.

L's headquarters was secure and quite effective at keeping the zombies out... at least for a while, however since the Taskforce was no longer affiliated with the police no one carried much ammo.

Luckily the Death Note worked on zombies.

Zombies are just humans that are having trouble staying dead. The Notebook rectified that problem.

That's how Light, Kira, became a hero, even to non-Kira supporters as he single-handedly killed off the first wave. Though, as L was quick to point out, Light would never have been able to pull it off without his surveillance cameras and facial recognition software.

Of course not everyone was happy about this revelation...

"I can't believe they're worshipping that lying traitor! I'm almost glad the Chief never got to live to know that his son..."

"Uh... Aizawa..." Aizawa finally noticed how Matsuda had gone pale...

Aizawa, startled and turned slowly to see Kira was standing right behind him.

Light didn't look angry—just very sad and tired.

"I'm just glad to see you're back safe, Aizawa-san," Light said softly and turned and stalked away.

Aizawa wondered why he felt like he just kicked a puppy.

'He's a mass murderer! Not a kid that didn't get picked for the kickball team!'

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As Light walked back to mission control most of the survivors recognized him for who he was and supporters and opponents alike gave him plenty of space.

Respect, fear... it was the same thing really.

As he rounded the corner he came upon another group of survivors ganging up on someone...

"How dare you defy our God Kira!"

"We should teach her a lesson!"

Light cleared his throat. "You dare to use my name in vain?"

The perpetrators turned to see Light giving them a murderous look.

"It's you..." The gang gulped in unison and prostrated themselves on the ground. "We're so sorry, my Lord."

"Surely there are labor duties you should be doing?"

The gang whimpered, thanked him profusely for not killing them then and there, and ran for their lives.

"Hey, are you okay?" Light asked the shuddering would be victim.

"Stay away from me!" She shrieked.

"Sayu?" Light gasped when she realized the identity of the victim.

"I don't need help from YOU!" Sayu shouted and hurriedly brushed passed him.

"Wait, Sayu...!" She was already gone.

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Light collapsed into the seat next to L where the detective was crouching on the sofa staring mournfully at what (to L) was pitifully small ration of candies. Light began reviewing the plans they were drafting for the up-coming mall raid.

"Ryuuzaki, while it's not an urgency we'll eventually need to get some apple trees for the hydroponic garden… this rationing is turning Ryuk into a pretzel."

"I could care less about your Shinigami," L grumped after popping the last of the M&Ms into his mouth.

"I said it's not an urgency... but if Ryuk is displeased he could always decide to kill me and Teru and take the notebooks back."

L winced. As much as he hated it, Kira was needed for their continued survival now. They were severely low on ammo. Without the Kiras they wouldn't last a day let alone a week.

"Yes. And I doubt anyone else will touch your Death Note after you gave that little speech about how by using it you're selling your soul for the good of mankind and the user will find no peace, no afterlife. It wasn't true by the way, was it?"

Light just grinned madly but gave up no more secrets.

From what Light could infer from his talk with the Shinigami Ryuk it would make no difference, there was no afterlife. Light just omitted that little detail to ensure that L or some other ungrateful survivor would think twice before trying to have him killed and usurping his power. As long as they thought there was such a price for using the notebook it would deter others from making that move.

True or not, Light apparently believes it. L noted to himself and felt a stab of pity for his arch enemy. You prideful fool!

L stared at where Kira slouched next to him tiredly, his head tilted back, glaring at the roof with unfocused anger...

"Light, what's wrong?"

Light rolled over tiredly to face L.

"There's still a lot of... dissent among the survivors."

"Your supporters and mine?"

"Yes..." Light sighed.

"That's to be expected..."

"Can't they just suck it up and work together for one zombie apocalypse? I mean we work together just fine..."

"No," L stated bluntly.

Light looked confused and hurt at L's apparent rejection. Wasn't that what they were doing? Weren't they partners in this?

"We don't trust each other and it shows," L elaborated.

Just then the zombie alarm went off again and Light sighed and retrieved his notebook.

"I'd question your intelligence if you did trust me," Light pointed out reasonably as he returned more zombies to the grave.

"Because you tried to have me killed..."

"So did you..."

"I was trying to have you arrested..."

"Which would have resulted in me being killed. So, the same thing..."

L sighed. "The thing is; I WANT to trust you."

"I feel the same way," the pen scratched and scribbled across the page. "We need to for the sake of our followers..."

"And for your sake as well, Light-kun."

"Huh?"

"I mean look at you..." Light was confused at what L was getting at , as L was indeed looking at him with those all-seeing eyes... "You've been an awfully good sport about all this considering everything I put you through for the case... confining you for fifty days, constantly testing you, making your father..." L didn't trust that Light wasn't holding a grudge.

Light winced and tried to once again repress the memory of having a gun pressed against his head. "I know..."

"...and bothering you right now…"

"Well, you know me, Ryuuzaki. I am a very forgiving person," Light said as he put more zombies to death with a flourish of his pen.

L barked out a laugh and... that was so weird, L laughing?

"Something's been bothering me, though. You could have easily killed me and run all this yourself..."

Light blinked, he had worried about the same thing...

"Honestly? This is your facility—no one knows it better than you—it's far easier if you're alive."

L nodded. That was the same reason he hadn't just taken the notebooks for himself. It was far more convenient to have the Kiras do the killing. Light already knew all the ins and outs of how to use and exploit the rules of the Notebook.

"We need to resolve these trust issues quickly, Light-kun. Not just for our sakes but for the survivors as well, they're counting on us..."

"Well, I'm open to suggestions. Somehow I don't think the standard catch-and-fall exercise would work..."

"Oh? Why not?"

"Because I'd catch you but I don't trust you to catch me..."

L smirked. "You know I can be a very good catcher too."

Light however was too preoccupied with killing zombies (and too "innocent" to notice) so the innuendo went right over his head as he finished killing the remaining undead stragglers with a swipe of his pen.

"So Light-kun doesn't trust me..."

"Oh I trust you alright, but with my luck you'd get distracted by a piece of cake or something in the middle of the exercise..."

Cake that was another priority item to add to the list for the coming raid… and oh, Light was still talking. Perhaps he had a point...

L interrupted whatever Light was saying to propose his grand plan.

"Well, this step seems rather drastic but I'm not seeing another option for resolving these trust issues."

"I'm listening."

"This alliance can't stand unless we have each other's absolute loyalty so we will practice this with a series of drills..."

"Will these drills will take a while?" Light asked as he finished killing the last of this latest wave of zombies. "If so we should probably have Mikami, Mello, and Matt running mission control in case of an emergency..."

"That's a very good idea and it will help them get used to working together. Because, yes, these drills will be very strenuous I'm afraid. But again, I'm not seeing another option..."

Light sighed and turned to face L, his arms folded and legs crossed—protective body language, L noted with a smirk. It seems he understands where this is going on an unconscious level...

"So... how do we do this?"

"Well... we will take turns being in power over each other. The one in power will have total control and does whatever he wants. The one submitting must obey his every command..."

"Okay... that sounds simple enough..."

"...and we will do this by having sex."

Light made a startled noise and clattered out of his chair into an undignified heap on the floor.

"What?"

"It's well known that sexual relations are used by both humans and social animals to help establish and strengthen bonds of loyalty among social groups..."

Light blinked very slowly. "Ryuuzaki... you're asking me to have gay sex with you."

"It's not gay it's just a trust exercise," L insisted.

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To be continued...