Rainbow Dash and Twilight once dated and they had some really hot and steamy sex in her library. However, ever since Twilight moved back to Canterlot to help her parents, Rainbow Dash is feeling lonely and thinks about her sexy mare almost every night. She misses her a lot, but most of all, she misses that very distinct smell that emanated from Twilight's sweet spot. It wasn't until one day, Rainbow Dash couldn't take it anymore, and decides to go on a trip to Canterlot, just to get a whiff of that sweet smell from Twilight's Taco.