Well, this is my prediction.
I think that the uncle is probably the part of the "humans" who sided with the demons. So basically he probably invited them as a distraction to keep them from the Halstead castle while the demons were sent to destroy it. [Hopefully that helps u understand a bit more]
They went to the crystal castle and found out that while they [ml and fl] were attending a ball, the demons will use their absence to their advantage to destroy Halstead.
Crystal palace, I think its just a place held by a higher status person.
We don't know who sent the demons or who that white hair hot guys is yet but im thinking he is the one who sent them according to my prediction
Hope this helps u a bit (=・ω・=)
Thank you so much! I understand now!
I'm glad it did! <3
ok I need an explanation cuz my slow ass can't understand anything i'm reading. I saw in another comment that the guy who invited them to the party/the guy with the scar is her uncle but why would he invite them if he never liked her in the first place. Also, I don't understand why they went to the crystal palace and what they found out. What do you even do in the crystal palace? What do you do there anyway? is it like a hangout for demons? who sent those demons to attack Halstead? and who is that white-haired hot guy?