Amai Choubatsu: Watashi wa Kanshu Senyou Pet
The story is set in a prison in the near future. It revolves around Hina Saotome, imprisoned despite her innocence, and the elegant yet sadistic guard Aki Myojin. Hina's heart and body are at the mercy of Myojin's "heartless yet sweet domination" from physical examinations to lovers' prison visits. The subtitle of the original manga's title translates as "I Am the Guard's Private Pet." (Source: Anime News Network)