The Testament of Sister New Devil (2015)

Anime series · Animation, Action & Adventure, Comedy, Sci-Fi & Fantasy · 2 seasons · TMDB 7.9/10

Toujou Basara is a high school student whose father has suddenly just remarried. His father then departs overseas leaving Basara with two new beautiful step-sisters. Little does he know, his new sisters, Mio and Maria are actually the new Demon Lord and a succubus!?

Not on a subscription app in India right now.