Twilight's smart enough to have nothing to do with Rarity and her gang of delinquents. But as her world view is challenged and as Rarity takes interest in her, slowly Twilight finds herself getting closer to Rarity and becoming a delinquent herself.
Twilight has too much time on her hooves. Twilight has a spell that involves 'transposing male characteristics' that she hasn't tried yet. Twilight is about to get herself into a whole world of trouble.
A strange condition has Twilight courting death in the wake of her battle with Tirek. Now her life depends on Luna, and both lives will be affected. Hopefully for the best.