Arm Jihyeop vs Muhan Rams (Concern about Sagging)

My forearms are really thick, so I'm having a hard time deciding between Jihyeup and Muhan Rams.
 I have very thick, inelastic tofu, and I don't build muscles all over my body.
 I started to realize it when I was in the 6th grade of elementary school when I was teased about my forearm fat, and it's 1000% inherited from my mom. There was no improvement with exercise.
 That's an arm that was exercised. Are you crazy?
 It's really, really, really inelastic, so I'm so scared that it will sag due to abdominal pain when I breathe. No, this is a skin condition that won't sag even after wearing compression garments for 6 months
 . I'm also considering Muhan Rams. Which one do you recommend in my case?
 My specs are 159cm/53kg. I gained weight and now I'm going on a diet. Even though I weigh less than now, my forearms haven't changed much.
 The circumference of my forearms in that photo is 31.5cm.