Well... I was googling what a white rose symbolizes, because...
White roses do also symbolize new beginnings. (or maybe it is just in a context that has to do with marriage)
And well... I'm excited for Paradigm to come out.
Maybe they didn't think that deeply about the rose and were just thinking "let's make Seonghwa have a rose in his mouth because that will look cool, and it should be white, because it would match his outfit."
