What im worried about is the ending do I really have to give any of my girls away when I have many ways to give my people, girls first off there are places that I control and will control that could give a lot of girls and even if I asked the public girls would most likely come with me but the last thing I have could solve all of the problems if I don't have enough women the magic arm gourds that could turn men into women that atomically fixes everything I really don't want to give any of them away
I don't actually know what Ker originally planned, or what the remake dev plans, but I can say that in the original game there were several things that hinted at the idea that maybe the MC's country was actually on the continent you're adventuring on in the far, far distant past, but long gone/passed into rumor and legend, possibly under a different name (no one had ever heard of it, it was claimed that nothing existed beyond the storms, etc.). This would mean the MC has time traveled far into the future, in which case the 'solution' would be that the hero would eventually impregnate all of his slaves, having them effectively all become his wives, to 'save' his nation.
There are also parts of the Cheli prophecy narrative that also suggest perhaps there is meant to be a plot twist that the MC's home nation are actually the ancient predecessors of the Cheli, which is not something most people would expect due to the MC not looking anything like the Cheli. In this narrative, the MC basically is the King Arthur figure returning to lead the Cheli into becoming a great nation, effectively 'saving' his people in this way. Ker clearly had a soft spot for the Cheli in the writing, giving them huge swaths of attention as far as lorebuilding, etc. goes, so this wouldn't shock me if it had been the original plan either. If this WAS the plan, the MC's harem could still essentially remain 'just' his (assuming you don't select things like the NTR-ish take on the Jessica relationship), since the existential threat against the Cheli isn't infertility any longer but colonialism.
I will say as a caveat that everything I've written in this post is pure speculation based on my own interpretation of a game that was unfinished and apparently abandoned.