Chop green onions into small pieces. Take out a mixing bowl and pour-in the heavy cream. Then add-in the chopped green onions and Soy Sauce (1 Tablespoon). Mix everything thoroughly. 

Set the bowl aside for at least 1 hour (or overnight) in refrigerator.

Next, cut mushroom, garlic cloves and onion into thin slices. Split broccoli florets into smaller pieces as well. Cut the bacon into bite-sized pieces.

Peel, devein and butterfly your shrimp.

Finally, take out another mixing bowl. Add-in the cleaned shrimp and bacon strips. Add in Gochugaru (1 Tablespoon) and Mirim (1 Tablespoon). Mix it thoroughly.

Put oil into a large frying pan. Place on medium heat. 

Once oil is hot, put in garlic pieces. Once the garlic pieces start to sizzle, place in the shrimp-and-bacon mixture. Next, add in the mushroom and onion slices too.

Stir everything until the shrimp get plump and the bacon develops a slight crisp on the edges. Then pour in that heavy cream (1.5 cup). As well as the milk (1.25 cups). 

Now raise the heat to a medium-high heat. Once the sauce starts to boil, place in the broccoli pieces.

Allow the mixture to reduce for approx. 15 minutes on medium-high heat. Stir occasionally.

Meanwhile, you should cook your pasta according to box instructions. (Note: Cook the noodles adente, so it can finish cooking in our sauce). 

After 15 minutes, the sauce will have thickened (reference video). Take a quick taste and add-in some salt (few shakes). (Don't forget this step to season)

Finally, add your cooked pasta into the sauce. Stir around and coat evenly. Plate the noodles and garnish with a few sprinkles of green onion. 

Bon Appetit! Enjoy life :)