I mix a brew for a spell. I forget to read the fine print of side effects before tasting it! Suddenly, my breasts start to grow. At first I'm worried about it, but I begin to get heavily turned on my it and touch myself over my panties. I talk about my growing breasts, wanting them to be even bigger.

Includes 3 growth spurts, talking related to breast expansion, and body touching / feeling, breast bouncing and shaking, and more. No nudity, but NSFW themes.