Hardness is nerve tone & how "dry" you are. So unless you plan on taking steroids, eliminating carbs & salt from your diet, and drying yourself out like jerky, your ass will be as soft as a cotton candy pillow.
Now if I thought you were a Te dom or ILI I wouldn't even bring it up because those fuckers can get obsessed with the Te improvements and go off the rails. You'll know when enough is enough. It takes more than 6 months, and consistency. Its not like you're gonna fuck around and wake up a she-hulk.
But why listen to me when you could just see with your eyes
https://www.reddit.com/r/xxfitness/c...o_to_an_asian/
This chick did a different exercise but its the same physics
https://www.reddit.com/r/xxfitness/c...booty_edition/