Twilight and Shining were inseparable as foals. Even if she could annoy Shining at times, he never could stay mad at his little sister. He was her protector, her best friend, her big brother. Once he was old enough to foal-sit Twilight on his own, Cadence left to work on her various other royal duties, and he was in charge whenever their parents were out of the house to go to work or run errands.

However, his age had a side effect he wasn't prepared for, puberty. As he discovered a new part of himself, a primal instinct rears its ugly head.