It's not supposed to be realistic. It's fiction.
Intersexuality is not fiction. Intersexual people are not like vampires or elves who can be portrayed differently by each author.
I wouldn't care if they just went and called it futanari or whatever (although even that is already iffy), but the author called it intersex, which is a real thing, so I will analyze the portrayal of that real thing.
Just because a work is fiction it doesn't mean it can't be realistic in some way. That's an incorrect notion. In literature there's this thing called verisimilitude, which is basically how realistic or believable a plot is.
Even fantasy works can have verisimilitude, the EMOTIONS can be realistic, it's a way for the readers to connect more with the story and the characters. Actually, I know for a fact this would be both angstier AND hotter if the intersexuality was portrayed correctly.
And, well, realistic or not, this comic is just not good and that's that.
That's not how being intersex works. Labia majora and the scrotum are analogous structures, so it makes no sense for one to have both.
And if he has functioning testicles (as in semen production) then he can't have ovaries btw, because those analogous too. So if he gets pregnant in future chapters that's another misrepresentation..
This had the potential to be a romance that is inclusive to intersexuals (and it could still have sex scenes because sensuality and oversexualization are not the same!), but instead it's just disrespectful.