Tsuzuki Takumi is an orphan who spends his days with his childhood friend Serizawa Fumino at the cafe Stray Cats and with his friends, at the Umenomori academy. One day, his older stepsister Otome brings home a strange girl named Kiriya Nozomi to live with them. And when his other friend, Umenomori Chise , starts a "Stray Cats" club that helps people, Takumi's life is filled with new activities.
