NIMA-073 · Live Action! Returning Home to Announce Marriage, But Ended Up Fucking My Stepsister for Days - Konatsu Kashiwagi, Tsumugi Shimokawa

The super popular work by famous author Nyaa no Esa, with over 270,000 copies sold, is now brought to life in live action starring Konatsu Kashiwagi!
Tatsuya visits his girlfriend's family home to announce their marriage. There, he reunites with Benika, the younger sister he used to take care of when she was a child. Unlike the innocent girl from back then, Benika has grown into a full-fledged adult woman. That night, while Tatsuya and his girlfriend are enjoying drinks together, his girlfriend, Yuba, falls asleep early.
Watching this, Benika seduces Tatsuya right next to her sleeping sister. Tatsuya's self-control wavers, and despite the guilt, he ends up having sex with her...