A/N: Well, I was considering making this a two-shot, but I don't know. It needs some sprucing up. I'm not really pleased with this, but it's one of the few things I have that I'm even slightly pleased with, so… oh well. XD; Hope you enjoy!

-boredomkillz

Disclaimer: Durarara!! and its characters do not belong to me. Ryohgo Narita (and Suzuhito Yasuda ?) have that honor.

Izaya had always been fast.

Without thinking, Shizou's body would act whether he wanted it to or not. When he was mad, it would just move.

There had never been an encounter between the two men when Izaya hadn't pissed off Shizou. Just the mere sight of him or the whisper of his voice would incense Shizou beyond rationality.

Those were the reasons Shizou used to explain his behavior on that event.

He had just been walking the streets idly, hands in his pockets, no real destination in mind. He liked walking, it gave him something to do; something he could actually control. During his wandering, he could think about things, be by himself and not have a bother with the world. Or just stew, simmer and hate, hate, hate.

Until he felt that feeling. Like there was something here that shouldn't be. A piece of dirt besmirching something clean. A rotting wound that woudn't heal.

His body tensed, and he turned slowly, looking down the alley he had stopped in front of.

A man in a fur-hooded coat turned slowly, and a smirk unfurled.

"Spying on me, Shizzy-chan?"

His vision clouded, tainted red. He breathed in deeply, desperately trying to remain calm. He hated violence. "You're not worth spying on, Izaya-kun," he replied.

"Oh?" His voice was amused, patronizing. The ebony-haired man took a few steps towards him.

"You didn't attack me right away. Maybe you're getting better." Shizou cracked a knuckle, he needed to stay calm. He wouldn't attack, he wouldn't attack, he wouldn't attack…

"Could it be that you have realized you'll never beat me?"

A roar erupted from Shizou, and he charged, suddenly fogged over in the red mist. He couldn't think, he couldn't stop. All he could do was watch as he chased after Izaya.

They weaved through sidewalks, sprinted across streets, jumped over balconies, leaped from building tops, glided down stair rails, flew over benches and still they ran, one the lion and the other the lamb, but neither knowing just who was the prey or the predator.

After a few hours of relentless pursuit, Shizou began to flag. He paused for a moment, watching Izaya race to the top step of the stairs. Perhaps sensing that Shizou had halted, Izaya turned, a mildly surprised look on his face.

"Already tired, Shizzy-chan?" Izaya taunted.

Shizou shook his head, amused that he had chased after the man for so long. He glanced up at Izaya and for a moment, he could see a light-hearted glitter in those dark eyes, and he almost smiled. He didn't. Shaking his head, he turned, raising a hand in a nonchalant wave as he went.

There would always be next time.