Lol I did, and still had to choose 1 girl at the end
Well that's not supposed to happen. Did you really from the start say yes to every girl? If so and you didn't get the full harem route then there is a bug. You could tell Seacth (dev) directly via Discord.
Maybe try again from the start with the latest version of the game (12.5) and then see what happens. You could kinda speed through it and if everything works out, go back and experience the story in full afterwards.