For me I noticed the change it's so obvious and they even said if you read the chapter right after the King punched shin and he was recovering in his bed his father said "after all This YEARS....." and about why the boy was killed he's a sick king if the boy don't want him or don't play obidient he kill him like its nothing to him it just to show how monster he IS
He wasn't going to be executed the king wanted to hurt him and show him to people as an example of what will happen if you mess with the King and (if he could) know who did this to him (then the 4th Prince was going to save him but shin forbid him from coming closer or the king will know who did THAT to him) since he's his favorite he let him go but still under his protection in the Palace so the king won't touch him he pretend to be always sick and all (▰˘◡˘▰) hope that was good explanation
Sorry wrote a lot
the ageing in this manhwa is quite... quiet. I mean... i realised they aged by the way they looked but I wasn't sure until the end when they said that 5 years have passed.
also i'm confused about why that child was killed in the blooming room? right before dandelion died.
other than that the manhwa was great, can't wait for the 2nd volume