honestly, even though i was rooting for potato boy I still like the show they were some great scenes, the side characters were all very nice to watch and osts were good too. And well i'd like to belive jae eon actually changed in the end
actually putting on braces for a short period of time does no harm really, i have braces on too it doesnt really harm your health, also she must have put for a short while like filmed all the scenes with braces at one go or something