Work Text:
"Yifu," Chang Geng whined, inching closer on the bed like a kicked puppy. But like, a noble one that was related to the emperor and thus had a lot of dignity and was also really hot and probably taller than Gu Yun so that there was no question of whether or not he was going to top. He was stately. "Yifu, yifu, I want to do a lot of things to you that are going to sound really awkward to anyone listening outside the door and hearing me call you yifu right before."
"But your bone of cannibalism badness," Gu Yun said, wearing the sexy monocle even though he had his vision so that the fanartists could differentiate between them, "it will make you like the sex... too much."
"Zi Xi," Chang Geng said, voice dropping into a note of sexy seriousness, "I always like the sex... too much."
"I can't argue with that," Gu Yun said. His boner was already ready. "Do you want to tie me up so I'm helpless before we do it, or do you just want to wait for my meds to run out so you can live out your medically suspect nurse role play fantasies afterwards?"
"Both please," Chang Geng said. The rope was already in his hands. He was holding the lube in his teeth. "Yifu, I really want to have sex with you right now but would you like 45 minutes of explanation about the introduction of paper currency before we get to it?"
"I would love that," Gu Yun said, voice husky. "Yes your majesty, oh please tell me about troop movements and which advisors support which faction of the court, politics in my gay romances are soooo sexy," and then Chang Geng did and it was really entertaining. And no one skimmed past it.
Finally-
"Your majesty!" Gu Yun gasped, as Chang Geng plunged his whole meat desperately inside him, "yes- yes- I can't believe I ever thought I would top, your dick is definitely bigger than mine-"
"Yes yifu, it's because I'm taller," Chang Geng panted into his neck, working his hips steadily, like a machine- like a steampunk machine, that can fly because of cool worldbuilding reasons that everyone also didn't skim over- "oh, yifu feels so good around my cock-"
"I'm going to come!" Gu Yun gasped, and his old aching back and hips stopped hurting for about 30 seconds as Chang Geng's massive meat drove him over the edge into a painkilling orgasm the likes of which his regular NSAIDs could only dream of.
Chang Geng, of course, was not finished, but he pulled back to watch Gu Yun come and the possessiveness that rolled over him not only split his eyes into double pupils but also his dick, which was now not only the size of double dick but actual literal double dick, because of his magical mystical evil nature that only the power of horny for yifu could contain.
Then he fucked Gu Yun until he cried and came in him twice (one for each dick) and won politics also, saving the country, the end.