Okay, so this is my first Bruce/Loki. I haven't really bee able to find any, so I thought "HEY, Let's freaking do this!" Also, sorry, I haven't proof-read, this was meant to be quick.
Enjoy.

Chapter 1: One last night together

Long pale fingers traced down the back of his spine, sending a tingling sensation right through his body. Bruce let out a faint "Mmmmmm" Sound as he turned onto his back to face the beauty crouched on top of his now awake body. He barely had a change to lose himself in those emerald-green eyes when the God dropped long, gentle, perfect kiss on his lips. Bruce felt his eyes slide shut.
He was at ease. He was with someone who he could finally be with without fear of hurting them, with someone who could be as calm as him, someone who could suppress the beast within. Someone who knew what it was like to be a monster.
He felt slightly sticky from the sweat which had covered his body from the previous night. Bruce smiled into the kiss and gently pushed at the God's chest, letting his lover know he wanted to get up. This seemed to displease the God who let out a low hiss and pushed him back onto the bed possessively. This kiss was as gentle as the last, Loki considerate for Bruce's wishes and insecurities. Bruce allowed his arms to slide around his lover's neck as Loki turned them around so he lay beneath Bruce. Loki's hands slipped to Bruce's waist as their gentle kissing continued. Occasionally the God's hungry lips would wander to his lover's neck and Bruce would have to move them back to his. "Loki, shower." He muttered between kisses.
With a smirk, the God nodded and let Bruce go to the ensuite Tony had given him. Bruce was only slightly surprised when Loki followed him.
Cold water helped cool his back, wash away the sweat, but it didn't make him feel any less dirty. That was probably partly courtesy of the naked God who stood behind him, head resting on his shoulder. Giving up on his shower, Bruce turned to drape his arms around that perfect neck which connected a perfect body to a even-more-perfect head. Bruce was slightly afraid of the mischievous grin which this forced to the God's lips.
In one swift movement, Loki had pulled Bruce's legs up and was now carrying him, a sinister laugh filling Bruce's ears. A moment later and they were on the bed. "Now I'm going to have to shower all over again!" Bruce whispered in mock annoyance. Loki's grin met Bruce's lips and their hands entwined. "What do we have in common Loki?" Bruce wondered out loud. This just earned him a small snort from the God.
"Well, we both have a certain… fondness… for the colour green." Bruce couldn't help but smile at this. It was true. "I don't know Bruce… We are both monsters, we are both very must alone, we both find ourselves following a path we wouldn't have drawn for ourselves… we both find ourselves lying on this bed…" Loki swept a lock from Bruce's face and tucked it behind his left ear. "Together…" Loki pressed his lips once more to his lover's "Kissing…" And the God resumed, Bruce continuing to kiss back.
One long pale hand moved through dark locks and they rolled over again with low giggles.

"What if Tony was to watch the security footage and see us…like this." Bruce wondered aloud. He felt somewhat comfortable with Loki here. He was still the enemy and Bruce still fought him on a regular basis. No, the Other Guy fought him. Bruce was not an avenger, the HULK was. But it was Bruce who stayed here in Stark's home and with all the other Avengers. Tony was his friend, but he had to lie to him. Sleeping with the enemy. That would look Fabulous on his record. But that wasn't his reason. Loki couldn't be seen with him as much as he couldn't be seen with Loki. Loki who had killed Coulson. Coulson who had tried to kill Loki. All his friends had tried to kill Loki… but what could he do?
"He won't see anything but you sleeping safe and sound in your bed." The God's voice was all that could calm Bruce. He didn't want to hulk out. Although, last time was quite fun. Loki had decided to transform himself into a 'She-hulk' and that had been amazing sex. Bruce smiled.
"I love you." Bruce said as he looked down into the deep green labyrinths that were Loki's eyes. Bruce didn't expect an answer in words, that wasn't Loki's style. The God just answered with a hard and meaningful kiss. One of his "Me too, I love you so FUCKING much" kisses. Loki lowered his head to rest on Bruce's shoulder and he breathed in a deep breath which he followed with a sigh. It was a sign of contempt ness and Bruce wrapped his arms around his God and pulled him close. They knew each other well enough now to not have to speak.

Loki had told him that he would be moving a Chitauri army in that evening. This would be the last they'd see each other for a while as Loki would be taken back to Asgard. They just took in each other's company for a while. Savouring the other's smell and feel of the other's touch. The Hulk might see him later, but not like this.

I haven't decided if this is a one-shot or not, I think not though. It was originally going to be one but sometimes I need a break from frostiron so this is nice. I wasn't in the mood to get more graphic. I have my Frostiron fic for that. Winkyface

I might in the future though, M to be safe.