Prince x Former Knight. At first I thought it's just a horny manga lmao, seeing how the bottom is built ;-;but it turns out it was more than that. I really like it when they have to do something to make the sex worth it, like in this case it's the Prince's power, he has to be worthy of the knight even though his status is higher than the knight, he respect the knight so much it's so refreshing to see.