Futa's life changes after his sister Pi moves in with her beloved cat named Kyuruga. Having never had any experience with cats before, Futa finds himself in a completely new world. His days are filled with unexpected discoveries, as Kyuruga's mysterious behavior constantly surprises him. The way this fluffy pet behaves at home, its unpredictable reactions, and its mysterious gaze all stir up Futa, forcing him to study cat habits and characteristics. Every evening after work, he spends time observing Kyuruga and trying to understand what is going on in its feline mind. Over time, Futa begins to find something special in these moments - something warm and soothing. Funny situations, curious moments, and the unpredictable behavior of the new tenant make each day unique. Gradually, Futa realizes that the cat is not just a pet - it becomes a part of his family and a source of little joys that fill his life with warmth.