KURODENSHA - DS04 Namaiki Akuma Shimai Kousoku Choukyou Final (eng)

Title : DS04 Namaiki Akuma Shimai Kousoku Choukyou
Original Title : DS[daemon slave]04 なまいき悪魔姉妹拘束調教
Language : English (FanTL)
Developer : KURODENSHA
Released date : 2011-09-02
https://vndb.org/v11942

Description
Protagonist is having fun with his succubus slave Shiruko, when suddenly her sister barges in, determined to bring Shiruko back to their father Asmodeus. Instead she finds herself taken advantage off and fucked silly.