Raganuga Bhakti means to perform regulated devotional service craving a specific relationship and Rasa. Raganuga Bhakti is Sadhana.
Śrī Kṛṣṇa Caitanya Mahāprabhu in Śrī Caitanya-caritāmṛta, Antya-līlā 7.24:
tāte prema-bhakti--'puruṣārtha-śiromaṇi'
"Prema Bhakti is the highest goal of life."
rāga-mārge prema-bhakti 'sarvādhika' jāni
"Raganuga Bhakti is the highest perfection."
Śrīla Prabhupāda in the purport explain that Lord Kṛṣṇa is worshiped by regulative devotional service, but the highest perfection is Raganuga Bhakti.
