Part one: https://www.furaffinity.net/view/57880410/

Rocky rides the growing thicc fat Galvasui and then both galvasui and Silvallier stumbles upon a cave and smells a pure aura and both went inside. With their fat bellies they easily fit inside, but with their big butts expanding there was no way to escape so they pressed forward into the cave. Then a glow appears far deeper in the cave and as the cave corridor becomes a bit smaller. Silvallier and galvasui grunts and groins as the bellies and butts collides against each other and as they reach to the glow, they both found a mother load of pure mana crystals. Then rocky suggested a contest of whom sits the most will win. Silvallier and galvasui were ready and as rocky gives them the signal, both galvasui and Silvallier went forth and began scarfing down the pure mana. With galvasui belly being translucent rocky, watches galvasui expanding and then both galvasui and Silvallier began to grow bigger as they eat more and more pure mana crystals. Then after a quick minute, both galvasui and Silvallier outgrows the mountain as they took their last bite and their butts and bellies expands into larger sizes. Rocky holds onto galvasui fur and looks at the spectacle sight of two giants with big bellies and Assets. To be continued?

Art
Galva-species belongs to me