Contains spoilers for S05E24: "The Mane Attraction". If you haven't seen the episode before, go and check it; it's incredibly awesome!

After Coloratura performed her last song on the stage, she worries about her career. Applejack tries to encourage her and goes back to Sweet Apple Acres after that. A light brown colored stallion called Moonstone hears everything and feels sorry for Coloratura.
He wants to help her by being her new manager, but with a huge difference compared to Svengallop: he doesn't want to get paid by Coloratura. His only wish is to help her career grow again, and make Coloratura happy. Equestria's best pop singer can't accept the idea, to not pay him.
Moonstone becomes the manager of Coloratura, and he is doing everything for her, even something much more than what a manager would do. Of course, not by the pop star's order, but from his own heart.

Thanks to all my friends who support me to make this story!