Is Sakuramiya Shimai no Netorare Kiroku hentai?
Yes
Rated Rx (Hentai) on MyAnimeList.

OVA · 2019 · 2 episodes · Rx - Hentai
Hentai
After their parent's remarriage, Hinata and Saya became step-sisters. Eventually they fell in love with each other. One day while kissing in the school campus a member of Photography club took their indecent photo and started blackmailing them. Now what will become of the Sakuramiya sisters!
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