Champion of The Gods Romance Question

I am currently romancing Chiros, but because I know he can’t be end game I was assuming I could end up w the prince Travan later. It seems that the prince is in a romance with the guy training me Kionus, though. Do they always start out dating? Or, did the game activate this because I said I would be true to Chiros?
Either way, is it still possible for me to romance him once Chiros inevitably breaks up with me?
Thank you for any potential info!!

No if you say you wanna stay true or don’t date the the prince/princess when it asks you lose the chance to romance the prince/princess. You can still romance Kionus/Kiana later though.