In a small bowl, combine shrimp with salt and blackpepper. Stir until well combined. In a pan, melt butter over medium-high heat, add shrimp and sear the shrimp for 2 minutes and flip over and sear again for 2 minutes. Transfer the cooked shrimp to a bowl and set aside.
Boil water over medium heat, once boiling, cook wheat noodles for 2-3 minutes. Rinse the cooked noodles in cold water 3 times then drain.
Add cooked shrimp, green onion, minced garlic, chili flakes, green onion, soy sauce, dark soy sauce, rice vinegar, salt, and sugar. Heat oil until super hot then pour the hot oil over them. Mix until the noodles is well combine. Garnish it with green onion. Enjoy!