Oh... hahah That's no problem at all...No, it will not hurt your chances. You will be required to renounce your Korean citizenship should you be accepted to USAFA.
acho, yes you will be required to renounce your Korean citizenship. No offense intended but your response seems so very flippant. How will your parents react to your renunciation? You should research exactly WHAT you will be renouncing, what you will be giving up, before taking that step.
I applaud you for your dedication to the US, but caution you to do your research before you do anything.