Many Indian telecom providers (Jio, Airtel) offer Netflix subscriptions bundled with their postpaid or prepaid plans. Check your plan; you might already have free access to Aranyak in Tamil.
You can watch the series with by following these steps on Netflix India: aranyak web series tamil dubbed download
Aranyak is available on Netflix with Tamil subtitles . Many Indian telecom providers (Jio, Airtel) offer Netflix