You are a changeling, and you are different than others. A changeling has no feelings, no remorse. It was born to be a mindless slave. But you are different. Because of "her" you take actions for yourself now. And you can feel love.
A human(you) lives a boring, meaningless life on Earth. You feel that you'll be stuck in a repetitive cycle for the rest of your life. But Discord, God of Chaos, has other plans in store for you.
You are a human in Equestria that lives with your best friend, Lyra. But what happens when you begin to develop more romantic feelings for the musical mare? Will you face rejection and ridicule? Or does Lyra have some secret feelings of her own?