Tsuma Netori: Ryoujoku Rinne is an adult-oriented OVA that premiered on March 16, 2018, produced by ZIZ Entertainment and animated by Teatro Nishi Tokyo Studio. The series is based on a visual novel and falls under the hentai genre, with explicit content and themes.
The story revolves around Ikumi Sunohara, a high school physical education (P.E.) teacher who becomes the target of a man with unconventional and controlling desires. The antagonist, whose identity and motives are gradually revealed, finds a way to manipulate Ikumi, putting her in a vulnerable position. As the episode unfolds, Ikumi is forced to confront the moral and emotional dilemmas of her situation, particularly as it threatens her family and personal life.
The first episode sets the tone for the series, introducing themes of control, manipulation, and the struggle to protect loved ones under extreme circumstances. Ikumi's character is portrayed as strong yet vulnerable, making her a compelling protagonist in this dark narrative.