@savvoy He thought she was noble and betrothed. Without she being a true noble, he needs to stabilize his position before revealing himself to her. Right now there would be opposition to the prince going out with the daughter of a prostitute.
@Kaarme In fact is tagged as "slice of life" in the genre description. At first was about the MC doing things with modern knowledge and building a village with the kids. Your everyday isekai. Now is war and conquering. And harem of course.
Oh yes! Unnecessary rape to hate an useless new character. It's just bad writing and I hate rape plots. If there is no punishment to this guy soon, I'll drop the manga. I thought this manga was about slice of life.