The branded web series is one of the latest innovations in the field of the online video advertisement. Unlike advertisements in general that offer products explicitly, branded web series is a form of branded entertainment in the form of a short film format which is packaged into several episodes in the duration of about 5-15 minutes and placed on YouTube. This research aims to know the influence of branded web series on the purchase intention of XL as a telecommunication provider after watching the branded web series Memilih Maju. 138 data were collected through an online questionnaire and analyzed using the PLS-SEM method to assess the relationship between entertainment, informativeness, irritation, advertising value, brand awareness, brand attitude, brand image, and flow toward purchase intention. The results show that entertainment and informativeness have a positive and significant correlation with advertising value, advertising value has a positive and significant correlation with brand attitude, brand awareness, and brand image, brand awareness has positive and significant result with brand image, brand attitude positively significant towards purchase intention, lastly brand image positively significant with brand attitude. Moreover, this research is expected to provide benefits for readers, PT. XL Axiata Tbk., and marketers to develop marketing communication in the form of branded web series.