It doesn't have to be a harem. But, can like have some fun with them. I mean the game gives us hints that they can have content.
Okay, so this is from a post he made back in August on his Patreon where he addressed something like this
Maple is the final "proper"girl planned for the game! There will be other characters added and I might even add lewd scenes with others but I don't plan to have them show up frequently.
The characters that I plan to have lewd scenes with are:
-Emelie
-Victoria
-Bronwen
-Maple
I probably won't have scenes as ambitious with these characters as I just did with Emelie in Ch4. That sex scene was insanely ambitious for me with like... 150 image files total or something crazy. ( So many variants and making the 3 paths was a ton of work! They might be more like when you squeeze Victoria's tiddies. )
Emelie is the main girl and you won't have the option to " choose " another girl over her for the ending or anything like that. The other girls are secondary to her. ( The name of the game is My Pig Princess after all. )
But I still want the player to be able to get steamy with more characters!
TDLR; There are mainly 4 girls Emelie (Pig Princess), Victoria (Chicken Book Seller), Bronwen ( Pig Blacksmith), and Maple (Dog-girl Tailor). Emelie is the MAIN GIRL and the other 3 are side girls, expect content for all 4 they just won't get as much as Emelie.
Also from the looks of things and what he's mentioned on Patreon wouldn't be surprised if we get the next build by the end of the year.