It's really predictible so far. The MCs (more like Arien is the MC, and there's also her brother) are acting weary, the imperial family is belatedly smothering them with care, the nobles are scheming. Nothing too deep, surprising or innovative.
And manifestation is kinda stupid. Other princes could be just aged up since they don't act their age anyway? and the story wouldn't suffer much for it.
It's okay to pass the time, but I've read from start to finish with a straight face. There's no funny jokes to laugh at or deep emotional moments to make you cry, no mystery to be hooked on, no plot (yet). It's plainly bland.