* Based on a game by ELF 
A sincere older step-sister and a curious younger step-sister are doomed to become love slaves. 
One day, a house wife named Yukie has a traffic accident. She is ordered to pay a large settlement to the other party, Taketo, the son of the owner/president of Nogawa Industries. Unable to make the settlement payment, Yukie allows Taketo to have her sexually. At the same time, Takato's father, Nogawa, approaches Yukie's step-daughter, Rumi, and blackmails her. His evil scheme even reaches for Tomoko, Yukie's younger step-sister. 
(Source: AnimeNfo)


She's a voice actress affiliated with 81 Produce.

[Profile](https://www.81produce.co.jp/actor_search/index.php/item?id=235)

Rumi and Tomoko's father has returned, but he seems to have developed an uncontrollable urge for Tomoko, after seeing her all grown up. He tries to fight off his urges, and Takedo, in order to keep the family together.
 
(Source: Anime News Network)

Yumi Okamoto