The young maid opened the package she had just received to reveal a beautiful bottle with a pink liquid inside. "With this, I'll conquer Saito's heart!"

A few weeks ago, Siesta had stumbled across a special "Big Butt Potion" for sale on a shop. They had ran out of existences, but she managed to get the makers to send her a bottle for double the usual price, but for her, it was worth it.

"Instructions: Drink before going to sleep, and next morning your butt will be large and round, without imperfections of any sort. A single sip is enough for an entire day. We aren't responsible for problems that can happen if misused. Have fun with our product." Sounded simple enough. That night, Siesta took a sip from the bottle and went straight to sleep, happy to know she had just found the way to defeat Louise.

The next morning, Siesta woke up and before doing anything else, she checked out her backside. The results were amazing. Her ass had ballooned to the point it could cover an entire head, and her panties were almost invisible inside the massive crack. It's a good thing she was wearing a frilly nightdress, or her clothes would've broken. Just to make sure, she grabbed her cheeks, and found them to be extremely soft and squishy, almost enjoying her own fondling. She also made them jiggle, and was surprised at how much they moved. Needless to say, she was happy with her new bottom.

"Now, to get changed...!" To make maximum advantatge of her increased rear end, she put on a maid dress different to the usual one: this had a tiny miniskirt that covered almost nothing of her butt. In addition, she took off her panties for they were a bother anyway. With this, she was set!