Ep. 1: Fuuta's sister and her cat Kyuruga move in, sparking his curiosity about felines.

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Fuuta’s younger sister arrives at his home accompanied by her cat, Kyuruga. Having never interacted with cats previously, Fuuta finds himself increasingly drawn to their peculiar nature as he observes them more closely. Each day brings new discoveries for him as he navigates this unfamiliar experience. The narrative focuses on his growing interest in the strange behavior of cats, marking a shift from his previous lack of exposure to these animals. This daily exploration highlights his evolving perspective on the feline companions now sharing his living space.