Mama Katsu: Midareru Mama-tachi no Himitsu is an adult anime series produced by Nur studio, released in December 2022. The story revolves around Yoshi-kun, the protagonist, who becomes infatuated with Kyoko-san, the wife of his older brother. Seizing the opportunity when his brother goes on a business trip, Yoshi-kun decides to act on his desires. The series is known for its explicit content and exploration of taboo relationships within a family setting. Yoshi's girlfriend, Momona, also plays a role in the seduction of Kyoko.