Boil the noodles in boiling water, then rinse them in cold water.
Chop the kimchi into small pieces.
In a bowl, mix gochujang (Korean chili paste), red pepper powder, sugar, vinegar, soy sauce, and sesame oil to make the sauce.
Add the noodles, kimchi, and sauce together and mix well.
Serve in a bowl and top with boiled egg and cucumber.