i think they will explain that later or fl was swapped with the current princess now, not sure tho but i think there's still some other details regarding fl's background in the previous chapters, you may as well reread.
I'm pretty sure the first male lead is the King, since he's the one in love with the MC. And the MC is currently crushing on King so their feelings are somewhat mutual
I thought they'd explain more about his child before ending it. Like I thought the son was going to be some final boss before he got back to Earth And how the hell did that dragon cross over and is it the only creature that crossed over?
I wish I could order a truck-kun agency to hit me and my cousin so we're reborn as twins in a fantasy world