An OVA for the TV anime Testament of Sister New Devil (Shinmai Maou no Testament), based on the light novels by Tetsuto Ueso and illustrated by Nekosuke Okuma, has been announced for 2018. The OVA series will be an original story and will have the title Testament of Sister New Devil Departures.

Prior to the release of the OVA on 28 March 2018, there will be a two-week screening at Japanese cinemas from 27 January 2018. The cinemas to screen the OVA will be Kadokawa Cinema Shinjuku in Tokyo, Fushimi Million-Za in Nagoya, and Umeda Burg 7 in Osaka.

Testament of Sister New Devil revolves around a boy named Basara Tojo and his two new step-sisters, Mio and Maria. As it turns out, his new sisters are demons and Basara is from the hero class! We are looking forward to what will happen in the new anime, which will see the characters head to an indoor pool!

https://www.gamers.co.jp/limited/79930/