Ruby Red and Amelia Green Lesbian Story

Mel hadn't really questioned her teenage life or her average style, and didn't see any need to, until that strange day.
On a whim, she skipped math class to go outdoors and enjoy the lovely spring weather, and that was the cue for a series of mysterious events.
Who was the strikingly beautiful lady in red? Where did the book come from, and who was Mel - really?