When two totally unthinkable ponies come together, what does everyone make out of it? A princess and a royal guard? Such is the case with Cadence and Flash Sentry upon just getting to know each other better. When Shining Armor begins to abuse his power against Flash, he goes and talks to Princess Cadence about Shining's abusive behavior towards him. But, after that one meeting, the two meet more and more often, to the point where they are officially a couple. How love works.

(By the way, Shining and Cadence aren't together. Cadence is single, and Flash is the first guy she dated in this story)