There was a seemingly small percentage of this happening. L wasn't exactly looking for the kinky side of his-
Friend
Love Interest
Rival
Main Suspect
Light Yagami. –His- Light Yagami wouldn't have warranted such a brazen reaction to the chains, once they were alone, that was. But perhaps Kira would have such a racy, thrilled repercussion to what L considered necessary. On any occasion, L would never have considered shutting his mind down- indulging in the sweetness of plain pleasure.
Until now.
Just moments before, Light had lost the modicum of control he had once gripped so tightly that his knuckles turned white. And L reveled in every second of it, although he hid the majority of his pleasure.
"Ryuzaki," The tone of Light's voice sent unseen shivers crawling down L's spine. It was deep and demanding, and sexy. L turned, his bad posture and dark circles and charcoal eyes meeting the perfect equivalent to themselves in Light Yagami. Perhaps that was why Light was the demon. Demons were deceptive, and must disguise their evil beneath a shroud of beauty. They were meant to seduce the humans.
The eyes of charcoal were empty as they met the eyes of evil, color irrelevant.
Things moved so slowly after that.
Light advanced towards L, the prey quickly becoming predator.
With the handcuff around one wrist, Light grasped a length of the chain. He then proceeded to wrap the portion of chain around the back of L's neck.
L felt the cool metal links.
And when the younger jerked him forward into Light, he felt the dull pain of the coolness biting into his tender, pale skin.
In one smooth motion their mouths met.
Light pushed out his chest so it was pressed against L's. He had talent with his tongue, the detective had to give him that. L felt his slender fingers curl around the chain, and he pressed himself into the kiss. It was hot and angry, and full of ceaseless competition just like everything else they did. They were peers, and L and Light had been intertwining their minds, over and over again, until the only distinction was the blurred grey line between what L knew was justice and what Light thought was such, since the day they'd met. Now their mouths were following suit and their bodies longed to do the same. Hard. Fast. Angry and rivaling and scarily passionate and simply –right-. L moaned softly at the thought Of Light's talented tongue on his most sensitive of places, of Light's perfect hair disheveled as L took him on top of messy sheets. Light returning the favor, dear god they would have to take turns, or perhaps a battle through gloriously tantric foreplay.
L decided that there was no going back from this kiss.
But his future, though certainly short, would hold all of his fantasies and more to be created. After all, he was chained to the damned man.