If you can't wait for an anime continuation that may never come, the original source material is your best bet:
Standard Version: This is the version broadcast on Japanese television. It is heavily censored, focusing more on the psychological drama and the "TL" (Teen's Love) romance elements.Premium Version: Also known as the "Complete" or "R-18" version. This is uncensored and intended for adult audiences, featuring explicit scenes that are cut from the TV broadcast. Source Material: The Manga amai choubatsu watashi wa kanshu senyou pet phan 2
Check for availability on AnimeFesta (Complete Edition) or Tokyo MX (Regular Edition). If you can't wait for an anime continuation
: The second volume of the manga was released in August 2017. It continues the story of Hina Saotome , an innocent office worker imprisoned in Black Wing Prison, and her intense, sadistic relationship with the chief guard, Aki Myojin . Source Material: The Manga Check for availability on
If you were looking for the music piece (OST) that plays during dramatic moments in the second half of the OVA, that track is often referred to as the "Main Theme" or generic "Dark Ambient" tracks used by the studio (usually Pink Pineapple). There is no officially released soundtrack album with unique track titles for this specific OVA.