Disclaimer: I don't own Durarara!

Rating: M

"Hey Shizu-chan, wanna do something fun?"

It all started since our high school years, during our usual chases. Thinking back, he was the one who came on to me. If it weren't for him asking that weird question, I wouldn't be so condemned to kill him now. Yeah, he's the one to be blamed for this.

"Ahh~ Shizu-chan… M-more…!"

"Tch. Izaya…"

In fact, it only started because of curiousity, that's all. Once was enough to sate the devil's tease, I thought. Although that 'once' turned into twice, thrice and so on. It became like a usual thing to do for us, like a drug; you know it's wrong, yet you'd still want to do it. My body seemed to have no means of stopping it, same can be said towards the lithe male. This is our guilty pleasure.

"Mmmmm~ Harder…"

Heed my words, our resentment towards each other hasn't change. This is only a physical relationship. Nothing more, nothing less. No unnecessary feelings attached, no fussing over what will happen next, that was what we agreed upon when we first started this.

The cycle repeats everytime, whether it was at his place or mine. Albeit, words will not be uttered afterwards and we must leave the other without looking back, reverting to our normal daily lives of being sworn enemies. That was our boundaries, that was our number one rule. But…

"Ahh, I'm beat. You're so rough during sex, Shizu-chan. Just like a beast."

"Oh yeah? If you're done talking, I'm off."

"Hey wait, Shizu-chan…"

We're the one who started this all… We're the one who set up those stupid conditions to never find affectionate for each other… And yet…

"It's raining outside, right? So why don't you just stay for the night?"

"….Stupid flea."

That one mere night however, we broke our own rules completely.

Welp, that was hella short wasn't it? XD