Hei guys, I'm on a little break from my other story "Naruto: the replicator" and thought of starting a new story at the same time. This is AU, set in the modern world. Basically, high school stuff but a little different this time. I was inspired by the game, "Left 4 dead" and the sequel. Hope you like it. Depending on the reviews, I'll see whether this should be a long or short story. If it's good enough, I'll make it a long one.

Please review, whether positive or negative

CHAPTER 1: WIDE-SPREAD PANIC

"What the hell is going on?!" Naruto demanded in confusion as they hid in the music room of their school.

"How should I know?" Sasuke replied back, locking the door and then walking to the windows, surveying the area, "Damn, there are more of them outside. Some of them are still normal but they can't outrun those... 'Things.'"

Naruto stood next to Sasuke and watched as his school mates tries to escape the chasing zombies. Unlike all those horror movies that they've watched, these dead creatures could run as fast as a normal person could but they seem to have no stamina. Once the pursuit was on, the only thing that could stop them was either they reached the target or killed. Luckily for Naruto and Sasuke, they have only encountered one of those 'things' and Sasuke killed it with one of the emergency fire axe they installed in school.

"What's going to happen to us?" Sakura muttered, still shaking from the shock after watching her friends devoured by the beasts.

"I don't know..." Naruto said weakly, "Sasuke, we had better barricade the door just in case."

Sasuke nodded and dragged a table to block the door. Suddenly, someone on the other side began knocking loudly on the door. The three inside the music room jumped back and Sasuke quickly grabbed his axe, waiting for the dead demons to blast through the room. However, that was not what happened.

"Is there anyone inside? Open the door!" A voice yelled from the other side of the door.

Naruto instantly recognised the voice, "Shikamaru?"

"Naruto?!" Shikamaru demanded, "Is that you? Hurry, open the door before one of those 'things' find this place."

From what Shikamaru had said, Sakura digested the information that he was alone and none of the zombies had followed him. Luckily for them, the music room was on the highest floor and the last room in the corridor. Sakura approached the door and twisted the door knob. Shikamaru immediately burst through the room, gasping for breath.

"Quickly, barricade the door!" Naruto ordered, locking the door once more and Sasuke blocked it with a table.

Shikamaru took a seat on the piano stool, still panting for breath. Naruto and Sasuke continued to add extra items to barricade the door with anything that they could find. After all, if more of those come, it should hold them off for at least a minute which would give them enough time to think up of a plan.

"Shikamaru," Sasuke said suddenly with a cold voice, "Were you bitten anywhere?"

"What?"

"Answer the question! Did any of their blood enter your body in any manner?" Sasuke had picked up his axe now, looking at Shikamaru threateningly.

Shikamaru shook his head after he inspected his body, "No, and you can put the axe down now."

Sasuke glared at Shikamaru for another second to make sure there were no bitemarks whatsoever on his body. It seems Shikamaru was clean and even if he was bitten, no doubt Shikamaru would either had turned into one of 'them' or killed since it was nearly impossible to outrun or fight off once they got you. That was what Sasuke witnessed.

"What's with the bitten theory anyway?" Shikamaru questioned.

"We better start up with what we know..." Naruto said, taking a seat.

An hour ago...

Sasuke raced through the traffic with his Toyota Celica since they were late for school. Actually, he would have been on time if it wasn't for Naruto waking up late. He had to pick up his friend on the way and Naruto was still sleeping soundly when he arrived. Sasuke shifted to fifth gear as he sped through another car.

As for Naruto, he was busy switching the radio channel, trying to find a station that was playing music rather some boring news report. After another few seconds of browsing the stations, he finally decided on some random station since they were already near school and won't have time to listen to any sort of music.

"Late last night, there was a report that several unknown species have escaped the Animal Research Facility in Konoha," The newsman reported, "Citizens are warned to be careful if they have sighted any strange creatures if spotted and report to the local police. The research team are currently being treated in..."

Sasuke switched off the radio as they reached school, "Konoha is so boring that the news will even report the slightest bit of crap that's not even worth hearing."

Naruto snickered, "You got that right. Come on, we're late for homeroom class."

The two youngsters raced through the steps of Konoha high school as another sort of competition between to see who would reach class first. These two were best friends and yet also rivals at the same time and it helps the two to score high in their exams and sports. As a matter of fact, if one was not present, the other would not be able to perform their very best since they had no rival to boost their spirit.

Unknown to everyone, the research team were not being treated but were already dead the night before when the infected animals had escaped and infected the researchers. The animals escaped and everyone thought they could be treated. Five minutes later, the infected researchers turned into mindless beasts that attacked other scientists in the building. One of the scientists was able to call for help and a few minutes later, three police vehicles arrived to investigate the problem. Unfortunately, headquarters have yet to hear from them.

The homeroom class proceeded like normal and just five minutes before the bell was about to ring, Naruto spotted something odd outside the window. The vice-principal was pulling one of the teacher's away from the gates and Naruto could see that the teacher was screaming in pain, holding his right arm. The school's security guard was trying to fend off about three men dressed in white suit, and he could see a dozen more approaching.

"Sasuke, take a look at that..." Naruto nudged his friend.

"What?" Sasuke took a look and needed a few seconds to process the information, "Are they attacking the security guard?"

"Looks like it to me..."

The two continued to watch on as the swarm of attackers overwhelmed the security guard and much to their horror, it seems that they were biting parts of the guard. Blood were all over and it was no doubt that they have killed the poor man. Naruto gasped too loud and their homeroom teacher noticed it.

"Naruto! And Sasuke! What are you two so engrossed at? Stop looking out the window!"

The homeroom teacher took a quick glance and was shocked to see so many people outside the school, and they were making their way to the school. She could see that the vice-principal was pulling a teacher towards the school and she put two and two together and realised that something was not right.

"All right class," The homeroom teacher spoke calmly, "Since homeroom is about to end, you guys can head off to your class now. I have to meet with the other teachers for some discussion."

The class obviously noticed that the teacher nearly ran out of class and the whole class started talking with one another and at the same time, grabbing their bags for their next class.

"What the hell is that? Some sort of parade? Or a strike?" Naruto said shakily, seeing the dead body of the security guard. His right arm was seperated from the body and there were holes clearly seen from the bites.

"I don't know," Sasuke muttered, "But I think it is a good idea to get out of here. Fast!"

"What's going on?" A voice asked cheerfully.

Naruto and Sasuke turned to find Sakura there, smiling at them. Naruto wondered if he should tell her the problem or not. After all, it could just be some sort of parade but the death of a security guard told a different story and even the dumbest person could tell that.

Sasuke grunted and was about to say something when a scream was heard in the hallway. All of the students still inside the class immediately ran out to see what was happening. Naruto had a bad feeling deep in his gut that told him to escape now while they still can but he wanted to see what it was.

The sight before them horrified them. Their homeroom teacher was being torn apart right in front of their very eyes. She screamed for help but none of the students dared to do so against the swarm of monsters. Her screams had attracted the other students and when they witnessed what was happening, they screamed and this caught the attention of the other undead beings.

"RUN!" Sasuke yelled and ran past all of the students followed by Naruto as he pulls Sakura with him.

The students ran for their lives, literally as the monsters chased them down. It was almost like a cat and mouse game and many of the students who were not fit were easily caught. Even those that were in the track team thought they could outrun them but there were simply too many of them and monsters seemed to have endless amount of stamina.

Sasuke concluded that since they had entered the school from the main entrance, it was obvious that the safest place right now was on the highest floor. Sasuke planned to take the roof but there were chances that it was locked. Right now, he needed to get to a safe place and contact the police.

"Come on, follow me!" Sasuke shouted as his two friends behind him.

East wing of the school...

The school was in total chaos as students screamed for their lives and the teachers tried to restore order. They were the ones easiest to be killed and slowly, turned into one of 'them.' One of the senior girls had hidden herself in the girl's bathroom and was shaking in fear, clutching her knees to her chest.

"Anyone here?" A voice asked.

"Who's there?" The quivering girl asked and another girl, perhaps in her second year appeared, clutching her arm.

"They bit me..." The new girl stated, crying bitterly, "But I was lucky enough to escape them."

"They didn't follow you, did they?" The senior girl inquired, inspecting the girl's wound.

"No... I..."

Suddenly, the girl collapsed to her knees and started coughing out large amount of blood. The senior girl stepped back horrified by the scene before her. She kneeled down next to her to see if she was alright. The second-year girl stared at the senior girl, her eyes blood shot and her teeth were now razor sharp. The next thing that happened was the screams of the senior girl as the second-year assaulted her to her death and transforming her into something else.

Third floor of the school

Naruto was trying to catch his breath in the corridor as Sasuke inspected the area. Sakura was clearly confused by the situation but had kept her mouth shut since Sasuke ordered her to do so, not wanting to attract any of those demons. Sasuke was a suitable leader and rightfully so since he was the Uchiha heir to the large Uchiha corporation.

"Help me..." A voice said from the stairs.

All three students turned behind them and saw a freshman student wobbling towards them and they could see that he had been bitten on the shoulder. The freshman called out for help once more but it only came out as a whisper. Naruto wanted to help when the freshman dropped to his knees, vomitting out blood.

"Step back!" Sasuke instructed, unsure of the scene acting out before him.

"He needs help, Sasuke!" Naruto retorted but he obeyed Sasuke's orders.

Before Sasuke could reply, the boy looked up and charged towards Naruto. Luckily for Naruto, he had learned small bits of martial arts, more to Muay Thai and Jujitsu which helped him in his reflex. Using the basics, he avoided the charge by side-stepping and then used his elbow to smash the boy at the back of the head. The boy growled in pain but continued to assault Naruto.

Naruto was amazed by the sheer speed of the boy and stepped back when he accidentally tripped and fell on his back. The boy lunged for Naruto, his jaw's open for the bite. Naruto knew it was over but Sasuke arrived on time, plunging the fire axe he took nearby on the boy. Naruto crawled back and Sasuke did this three times until he made sure the creature was dead as blood dripped from the axe.

"I... killed someone..." Sasuke muttered to himself.

"It's not someone!" Naruto said with disgust, "It's a monster!"

"We had better get to a safe place first." Sakura suggested, her eyes never leaving the dead boy.

"Any ideas where we should go?" Naruto asked.

"The music room," Sakura replied, "It's at the far end of the corridor. It should buy us some time to think of what to do."

Present time...

Shikamaru nodded slowly, "Yeah, I remember seeing those people entering the school. Could all of them be monsters?"

Naruto shrugged, "We don't know anything except the fact that those bitten turns into... 'Them.'"

From inside the music room, they still could hear the screams of the students and teachers as they were overwhelmed by the large number of infected. All four students sat down and started planning on what to do next. But there was one thing they had agreed on. They had to stick together to get out of here alive.