"Cool Devices" is an anthology series known for its explicit content and mature themes. Episode 7, titled "Yellow Star," delves into a narrative that intertwines elements of power dynamics and psychological exploration. The episode centers on a young woman who becomes entangled in a complex relationship, leading her to confront her desires and boundaries. The animation style is notable for its detailed character expressions and atmospheric settings, enhancing the intensity of the storyline. The episode's thematic depth and character development offer a provocative look into the complexities of human relationships.