Commission for a client.
One evening, while Erin and Marie are recovering from a stressful day, one of them makes a wish - it's more or less in jest, thinking out loudly basically. Just a comment that you'd say to let something out without expecting something to come out of it. The wish is that they wanted the simpler times back. It wasn't even entirely serious.
Suddenly their priorities in the past start shifting. Studying is suddenly so boring, especially compared to a lot of other things they could rather be doing! Rather than being honor students, the two of them would be besties, or BFFs as they call themselves now, along with new names: Emmy and Miley.