Quoted By:
I just realized something: Lorewise, Noctyx members came from the future, so I find it weird that Millie calls Fulgur her oniichan and him calling her imouto. If anything, Millie should be older than him. With that, it reminded me of the plot of Yoasobi's song Taisho Roman (plot is that a guy in the present era Japan began receiving and exchanging letters from a woman in the Taisho Era Japan until the Great Kanto Earthquake of 1923 happened in which he stopped receiving letters from her)