Clean the octopus and shrimp thoroughly.
Cut onion, green onion, carrot, and spicy green chili into bite-size pieces.
Add cooking oil to a pan and stir-fry the green onion to release its aroma.
Add the cleaned octopus and shrimp, and stir-fry quickly over high heat.
Add onions, carrots, and chili peppers, then stir-fry together.
Season with gochujang (Korean chili paste), red chili powder, soy sauce, sugar, minced garlic, and pepper.
Stir-fry well until the seasoning is evenly absorbed, then finish.