Yami no Matsuei, Tsuzuki/Touda, playing with fire
Maybe he's got a thing for danger. Or maybe he just has a thing for getting in trouble that he knows won't get him killed. Either way he keeps coming back, walking into Touda's rooms in the middle of the night to crawl in his bed.
The fire shiki is a strange sort of warm. He's warm inside, in his mouth and belly and the spots where the skin is thinnest, but he's cold everywhere else. Like his heat is trapped under a layer of scales inside, and the only way to feel warm is for him to curl and coil around Tsuzuki in a full body bind.
It's good to hold Touda. Better to roll him on his back and make him sweat, make him burn. The first time Tsuzuki didn't know what to do, how to handle Touda's lax submission to drunken fumblings and needy, depression driven advances. Afterwards...
There's something dangerous about having Touda under him. It's wrong in a way that makes it more perverse than simply fucking one of his shikigami. Touda is power. Raw, pure, uncaring power. A force of nature never meant to be tamed by anyone. Unlike the other shikigami he commands, Touda has never been challenged.
So when Tsuzuki slides in slowly, Touda's strange heat welcoming him in deep, it's almost enough to make him want to stop. Isn't it enough that Touda is crippled for him? Power bound and senses dulled, the chains of the Emperor still shackled around his wrists and throat. Hasn't he defiled this man enough?
But then Touda makes a questioning noise, and Tsuzuki can almost see the glitter in fire bright eyes, silver claws mindfully planted in the bedsheets. He can't stop. It's dangerous and possibly perverse, but Touda knows him. They know each other's pain. They share a darkness.
So he doesn't stop. Not until milky strands coat his stomach and he feels release hit like a fist to the spine.
He must like fire, he keeps coming back, waiting to be burned.