Go wild

"Okay, Bottoms Up, Grey."

The ice mage's mind became overflown by one single idea, and his body wasted no time in executing it. He licked his right middle finger before moving it towards his asshole. After rubbing it for a few seconds, he slowly inserted the tip of the finger, which easily went in, giving him a jolt of pleasure.

Natsu, meanwhile, had taken out the Sex Note again and quickly jolted down a new line: "Natsu Dragneel will not get tired from sex, will have no refractory period, and can cum as much as he wants. His ass will generate it's own lubricating fluid when inserting something into it, which will be as good as commercial products. Those characteristics, as well as his STD immunity, will spread to anyone who engages in any sexual activity with him." Of course, he couldn't transmit any STDs anyway, but he thought it would be nice to grant them the immunity he enjoyed.

When he looked up from the Note again, he saw Grey was already with his knees and face on the ground, fully erect, and vigorously fucking his own ass. Not only he was now introducing the entirety of his middle finger, but his index went in alongside it. "Natsu... I don't know what's happening, all I know is that I need... ahhh!" He moaned, interrupting his sentence.

Natsu's member seemed to want to follow the example of Grey's and quickly stiffened. The pink-haired mage positioned it above his friend's face and started stroking himself. This seemed to turn on Grey, who started to insert his fingers even harder, before taking them out "Ice Make: ..." He seemed too embarrassed to finish the name of the technique, as an ice dildo emerged in his hand. Natsu got a bit worried by that: the cold wouldn't affect Grey one bit, even like that, but if he puts as much enthusiasm into it as he was putting with his fingers a second ago, it could break inside, which would be problematic. However, his doubts vanished as his friend started using it. Ironically, the sight of the ice mage putting the frozen dildo in his ass was too hot for the fire mage to resist. He'd just have to trust on the robustness of his friend's constructions. Plus, if anything happened, he could just use the Note to fix it, right?

Natsu put his hand in his friend's shoulder to adjust his position. He met no resistance as turned Grey around, leaving him laying on the ground face up. No complains as he moved his head towards the unattended dich, nor when he started kissing, licking, or even sucking it whole; Grey just kept moaning and pumping the dildo in and out of his ass. Natsu stopped stroking his own cock and carefully positioned the tip in Grey's lips, and he happily accepted it inside. No other triggers had been used: he had managed to make him do it out of his own volition.

They kept sucking each other's dicks while Grey ravaged his own asshole. The arousal kept building and building, until they notice how each other was getting close to the edge. Increasing their speed, they wouldn't last that much more: after just a few moments, the pleasure was too much and both of them orgasmed violently.

But they were not the only ones to do so.

They heard a suppressed moan from a nearby bush, followed by the sound of moving leaves. Someone was trying to get away...