This is from my AU, Holyverse, where Nightmare and Dream are priests in the middle of an angel harem. I invite you to read the story "Finding the light again" where i share their story. You might understand some things too.
Killer here is named Cassiel and Cross is named Chamuel.**
Cassiel was again walking silently in the twin's church. His wings were folded in his back, his blessed cup sat gently on a bench beside his angel staff. The archangel always loved to stare at the colored crystal window, one discribing perfectly Jhudiel with this sun and warm rays flooding from the east of the church, and the other fit Leliel like a glove, telling his calm nature from the full moon on the west of the church.
Cassiel waited patiently for Jhudiel to end his day as a priest and spend some time with him. Even Death and rebirth could't erase his love for his Dream."You'll never change, Cassiel." said a voice in his back.
The archangel turned around, recognizing the voice. Neither of the priests, it was the annoying war angel that was staring at him with a bored face from the church's door. Chamuel stared back with a very serious face.
"You should let Jhudiel breathe a bit, you're always on his tail. But he's too kind to tell you."
"And you know it better ?" answered Cassiel, annoyed.
"For a fact."Chamuel was referencing to his past life, when he tailed Nightmare like a lost puppy, yearning affection, and when Nightmare rejected him, he turned to Dream and did the same mistake again.
It was difficult, for both of them, to speak of their past. They were used to be angels by now, but the idea that they died to the point of being recreated was even worse to bear than the death from resets. Even Cassiel was frowning from the thought, he who always was the extravert one, was now sinistrically silent. He was beside Jhudiel's altar, staring at the glass.
"Why are you here, Chamuel ?" finally asked Cassiel, without looking at his counterpart. "Leliel is working and we both know not to bother him."
Chamuel didn´t answer. He silently came to the archangel, who didn´t realize the other was now behind him. The lack of answers annoyed Cassiel, that finally turned to Chamuel. He jumped when he realized the other was in front of him, cutting off whatever he wanted to say.
They stared at each other for a few seconds before Chamuel began to walk toward Cassiel, making him step back. Not far, Cassiel quickly felt the altar against his lower back. Chamuel blocked him against it by posting his arms on the altar. The open souled angel put his hands on Chamuel´s, trying to pull them down."Chamuel ! What the-"
"Give me some" He cut off.Cassiel stared at him, dumbfounded. He was trying to understand what Chamuel wanted. He quickly understood though, when the other approached his face to his. Cassiel turned his head to the side but Chamuel took his chin to make him look back at him. The open souled angel found it odd, by the past, it would be him pinning the other to a wall, playing him.
Cassiel flushed, not used to see him like that, needy but stable enough to stay on his ground, waiting, like he was hunting him. Yep, he felt like his prey. Even though he lost his pupils and main sight, he felt like being eaten by his stare. Chamuel could see Cassiel's white pupils appear with his blush."Cassiel..."
The grip on his chin loosened, giving him a choice. Cassiel stared at Chamuel, still devoring him with his eyes. Fuck, he loved to see people wanting him like this.
Yes, that seemed like a good idea now. Looking for what he wants, where he can, and with someone who need it too. Chamuel was devoring him with his burning stare, Cassiel wanted the taste now he got the feeling.
He gripped the other's scarf and pulled him to him, kissing him without any warning. It took less than a second to Chamuel to press himself against the other, taking over the kiss and ravaging the other's back with his hands. Cassiel's arms went to Chamuel's lower back, pinning it against him. They pressed themselves onto the other, hungry for the desire, the heat and answering to their lust.