Responses
Sir you need to go touch some grass
Hope you don't actually mean that castration would give the prince another hole down there... cause that's not what it does.
You can read 'Shameless' by Shin Yuri if you want a eunuch MC.
um..
The uke might be a prince and all but he's built like an eunuch. If he was an eunuch, he would be castrated. I wonder if the seme would still fuck him? Probably yeah, cause now he'd have two holes to fuck. I wonder if the seme can grow a second dick in the future. Do consider the possibility author-san. ლ(´ڡ`ლ)