The series 'Kanojo ga Nekomimi ni Kigaetara' centers on a timid protagonist and his assertive girlfriend, whose relationship takes a wildly erotic turn when she dons a set of enchanted cat ears and a tail. Initially a playful dare, the accessories awaken an insatiable, feline lust within her. The story arc follows their escalating sexual experiments, driven by her newfound nymphomania. The first episode introduces the 'punishment game' where she wears the ears, quickly leading to an aggressive sexual encounter where she relentlessly rides his cock until he's completely drained. Subsequent episodes explore her transformation in more depth; she starts demanding rougher and more frequent fucking sessions, craving his cum constantly. She initiates sex in various locations, her inhibitions completely erased. Her body becomes hyper-sensitive, her pussy constantly dripping wet and ready for his thick penis. The climax of the series sees them engage in a marathon of raw, unprotected sex where she is anally penetrated and creampied repeatedly, her cat-like yowls of pleasure echoing as she orgasms over and over, completely surrendering to her primal new instincts.