This is the second version. The first part is closest to what the dream felt like, and there's also an attempt on different points of view. I love cocky, sarcastic characters and I tried to incorporate a bit of that into Kaname's part.
I don't think there is a need of a third version, so this should be the end of it. I kept coming up with explanations and backstory while writing, but none of them was interesting enough.
The building was silent, except for the heavy breathing of the young man rushing up the staircase. There was a lot of blood on the floor, some sprayed on the walls, and it was fresh.
On the sixth floor, a vampire sat on a green ottoman. The young man approached him, his heart pounding with anger.
"What have you done?" - he growled.
The vampire rolled his eyes. The man's legs trembled and he fell to his knees. He frowned in confusion for a moment, then realized the vampire was taking control of his body.
"No, no, no way. Not this shit again."
But it was, of course, in vain. His vision sparkled and the vampire caught him as he fell onwards. He knew what came next and felt a mixture of fear and anticipation. His eyes turned red, he shivered and felt his penis tingle.
"What have you done?"
Kaname rolled his eyes.
"If you just thought about it for five seconds you'd realize I could drink all the human blood I might want without creating this horrific scene and attracting the attention of every vampire within 5km. How could it possibly be in my advantage to be found in the middle of this blood bath?" - he thought.
Zero had seen the disaster remains and thought Kaname was to blame - which was quite a leap into conclusions, even for him. Anger made the boy flush, though, which was very appealing. Kaname decided there was no point in humoring a discussion and proceeded to persuade his companion to relax a little.
"No, no, no way. Not this shit again." - Zero said, then fell and slid into trance. The vampire lifted him onto the ottoman. He ran his fingers through the other's cheek and loosened his tie.
"Do I look satiated, Zero?" - he asked with a smile. The semiconscious boy laying underneath him mumbled a curse.
Kaname pierced his neck, careful not to spill any blood. Zero moaned softly.
"I suppose the advantage is that I get to see you."
Zero fought to keep his mind afloat and Kaname wondered whether he should release the spell. He placed his hand on the boy's swollen crotch. It really was a shame Zero was so... reluctant, when he clearly enjoyed the action as much as his counterpart.
"Maybe next time."