The Big Reversal Theory Or the Vixen in 4B

It is September 26th 2007, and the boys in 4A have their quiet routine disrupted with a new neighbor moving in next door. She is a feisty and beguiling brunette by the name of Amy Farrah Fowler. This is an AU story that wonders, what if Amy moved in next door so long ago and NOT Penny. This will be a multi-chapter story. Shamy. (Lenny as well in later chapters)