The present disclosure relates to methods, compositions, and kits for treating hair. The methods entail the use of multiple compositions, which can be incorporated into kits. The methods include: (I) optionally, cleansing the hair, for example, with a cleansing composition such as a shampoo; (II) optionally, treating the hair with a rinse-off conditioning mask, and rinsing the rinse-off conditioning mask from the hair; (III) applying a leave-on hair-treatment composition to the hair; (IV) without removing the leave-on hair-treatment composition, subsequently applying a leave-on hair crème to the hair; and (V) without removing the leave-on hair-treatment composition and the leave-on hair crème, styling the hair. The methods provide durable styling and conditioning benefits, frizz control/curl definition, and general hair manageability qualities.