Thread by @lemonaestheticc

Katsuki's the royal prince and Deku is his handmaiden, and the two of them have grown up together. But Katsuki's been much more sheltered than Deku, and it's not until he's expected to be married that he finds out about /sex/. But he wants to know more, and he thinks that out of+

of all the people he knows, Deku will have the most information. But when he sneaks down to Deku's chambers one night to ask him, Deku blushes bright red, saying that it's not something he can really explain properly, that it's something that's /felt/ and experienced.
"Okay," +

Katsuki shrugs. "Then show me."
"Wh-What?" Deku splutters, his eyes growing wide. "Th-The king will have my head!"
"I'll look after you," Katsuki huffs. "I'm not about to /tell/ anyone. Besides, you don't seem to be saying /no/."
"W-Well, you're attractive," Deku mumbles.
"Then +

show me how sex works!" Katsuki demands. "Show me how to make you feel good so that I can make whoever the fuck I have to marry feel /amazing/."
Deku's face falls for a moment, before he says, "Fine. I hope you're ready."
Katsuki scoffs that he is, but he's soon biting his +

words, because it turns out that Deku has a /lot/ of experience. Katsuki loses his virginity in the best way possible, and in the following weeks, Katsuki fucks Deku constantly, testing positions and kinks and everything /filthy/ that the two of them to think of. It ends on +

Katsuki's wedding night, but while Katsuki makes his new bride pass out from pleasure, he doesn't orgasm even once. Because his bride isn't /Deku/, and Katsuki's addicted to his body. So he returns to Deku, and they continue their secret affair, because they /fit/ together.
***