The Monster's Flea

Surprise

Hi yall HAHA I really shouldn't be starting another fic while I'm still doing my other Drarry one but, this prompt was beautiful so here it is hehe.
Based off Durarara, I obviously don't own it otherwise Shizaya would be freaking obvious canon.
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Red eyes blinked and darted around, looking at the darkness ahead. His heart made the loudest sounds he had ever heard on this quiet night. His feet moved so quickly forward, that his usual efforts to dodge the blonde's flying objects seemed so much slower compared to him now, and beads of sweat flew off his dark hair, into the air, into the night. His pace let up, and he slowed to a halt, all the while keeping an ear out for any noise behind him, and praying to the God that he would be a safe distance away. He wasn't. A clatter came from some distance behind him, and he froze for a few seconds, a look of terror decending onto his usually calm features. He had to get away. He had to escape. So he ran.

Heiwajima Shizuo had just gotten off work. Lighting a cigarette in 'celebration', he let out a few small puffs of smoke, admiring the bitter taste that remained on his tongue. Then he smelt it. The most disgusting smell he could and would ever smell, and the one who caused that smell could only be one person, no, one flea. The stinking flea was no person, he was like the devil. A characteristic frown pasted itself onto Shizuo's face, as he positioned himself to run towards the smell. What he didn't notice was that the smell was heading towards his direction at break-neck speed.

Orihara Izaya ran. The sweat poured down his face, neck and back as he felt like it had been eternity since he escaped from that place and ran. Streaks of red stained his pants, and they were ripped, large holes at places where there shouldn't be holes, and he wasn't wearing his shirt, only his fur jacket. He couldn't be blamed, he had no time to put on the shirt, and moreover, it wasn't like he could wear something that had been completely ripped to shreds. Even the jacket was carelessly draped across his small frame, worn merely as an attempt to escape from the cold and the overall look he had was totally uncharacteristic of the usually properly dressed man. But now was not the time to take note of such trivialities, and all Izaya could do now was run. He couldn't even put up a fight even though he knew his flickblade was nestled in his coat pocket, for he was exhausted, but he knew he had to keep moving and try to put as much distance between him and it as possible and so he continued putting one foot before the other, continued racing through the alleys and streets in a wild bid to lose the chaser.

As he turned sharply round a corner, he hit a human. Hard. Expecting the one he hit to stumble and fall, he braced himself, but the fall and impact never came. Instead, strong arms shot out and held him firmly by his shoulders. Too fatigued to focus on the being in front of him, Izaya merely half-collasped in his hold, breathing heavily. Then he heard it. Scrabbling claws on the concrete ground behind him, and fear struck him again. He tried to struggle out of the stranger's tight grip, but severely lacked in strength. An uncharacteristic whimper escaped his chapped lips, and in a last ditch effort to get away, he simply flung his arms around the neck of the being, clutching hard and whispered, " Run."

On other days, if this had happened, Shizuo would have flown into a rage only he was capable of, and perhaps ripped off some stop signs and hit the flea. But today was different. Everything was different. This didn't feel like the usual flea he knew. The calm, fearless and composed Izaya, with that cold malicious smirk on his face was not here, and in his place an exhausted, dishevelled and terrified Izaya in his grasp. Gazing into the blood coloured eyes of the man he was holding, Shizuo could only see the fear in the unfocused pair of ruby eyes. The usual evil glint in them was gone and a mixture of emotions Shizuo never knew the flea had had surfaced. Behind them, sounds seemingly of some large animal's claws against the floor echoed along the alley Izaya had just came from, and Shizuo immediately felt the half collasped Izaya stir and try to escape. Every cell in Shizuo screamed for him to let go of the flea, but intrigued, something held him back and so he continued holding him tightly. The next thing he heard shocked him. A whimper came from the raven-haired man in his arms and suddenly arms wrapped around his neck.

"Run."

Even though Shizuo knew he was definitely strong enough to crush the creature that was after the flea, simply by looking at his state Shizuo knew he couldn't be left alone. He needed to take the flea to Shinra and get him bandaged up. He was really in bad shape, and although Shizuo and Izaya were enemies, Shizuo couldn't possibly leave him when he was in this state. It didn't feel right. So Shizuo took his advice, held on to the flea tightly, turned and ran.

All the accumulated exhaustion finally hit him, and while nestled relatively comfortably in the hold of the one carrying him, Izaya felt his consciousness slip and he was enveloped by a veil of darkness. But before his eyes closed shut, he saw the characteristic blonde hair of his favourite monster next to him, and with all the strength he could muster, he breathed "Shizu-chan...?" before passing out and going limp in the monster's arms.

Shizuo had to admit, this bothered him greatly. What on earth could have reduced his flea, no, the flea, to such a state? Only he was allowed to break the dark haired man like this, and the thought of someone else beating him to it made him very angry. Very angry indeed. It didn't help that the flea had noticed he had picked him up and carried him away, it didn't help that the flea had breathed his nickname with such a weak voice unlike his usual, and it certainly didn't help that the flea had gone limp in his arms. Shizuo saw red, and since the flea had passed out, going to Shinra could wait. He needed to let his anger out on something, and he knew just what. He would just have to take down whatever was chasing them.

Shizuo gently placed the unconscious flea on the park bench near the fountain, rage building again as he gazed at the unusually calm features of the raven haired man, marred by the injuries all over his lean body. How dare the bitch take his prey away from him. His flea that only he could be the one to hurt him till this state, not that he had actually done it yet. Veins popped on his face and he bit down on the cigarette hard. Removing his glasses and slipping them into his pocket, he breathed in deeply, enjoying the bitter taste that flooded into his lungs once more, cancer sticks the flea calls them, as he throws the cigarette onto the ground and steps on it. Now, he waits.

He didn't wait very long, but definitely didn't expect to see that in front of him. Shizuo is a monster, and is friends with a legendary monster, a Dullahan, but the beast before him makes him gawk involuntarily.

A dog. A large dog. An extremely large dog. An extremely large rabid dog. An extremely large rabid dog padding towards him. An extremely large rapid dog with three snarling heads with white foamy saliva dripping out of the three mouths with huge paws and a vicious sounding otherworldly growls was skulking towards him. Cerberus.

"...Huuuh...?!" Shizuo muttered in mild disbelief, " So Cerberus actually exists eh? If I find out that Shira was involved in this... Ah. I don't have to hold back now eh?" Sounds of cracking knuckles echoed through the park as a devil-like grin appeared on the ex-bartender's face.

"Come hereee Shibaaaa-kuuuuuun"