Eh.. he just casually say 'yes' . Become the only husband well he may say that, but we talking about 'princess harem'. That dude, he basically male prostit didn't it?
i guess they'll get into detail about this later, but him being completely unfazed is insane. i don't care wtf happened to you when you were younger, being taken to what's essentially a different dimension because you got fucking tricked should at least elicit some reaction