Fluttershy's special somepony is White Heart. He's a guard at Twilight's castle, but there's more to him than his job; his magic has the power to make things grow.

Fluttershy loves to have fun with White Heart's magic; he can give her breasts so big they hit the floor, or give himself a dick like a tree trunk. But today Fluttershy wants more. She wants to test the limits of White Heart's power. She wants them to grow together, until they can't grow anymore.

But what if his power doesn't have a limit? And what if, once he starts, he can't stop?

Contains: Breast Expansion, Cock Expansion, Large Insertion, Cum inflation, Limitless growth (Chapter 2)