Because I am the type of person who used to read hydra trash parties back when they were into the MCU, I saw the prompt above (if I'm late, it's the royalty steddie prompt) and immediately thought... okay but what if it wasn't soft.

So, that. Same setup - Steve is a rival knight captured by Eddie's kingdom and set to be his bedwarmer (or just manservant, if you want to go easy on the smut) and then. well. Eddie uses him for what he was sent there for ;)