The Pet Girl of Sakurasou

While Sorata waits to receive the results from the gaming competition, his little sister Yuuko comes to visit him and becomes jealous when she sees how close he is to Mashiro and Nanami. The three of them go on a "date" with Sorata while they all vie for his attention. After the date, Mashiro and Yuuko get lost but Mashiro proclaims her faith in Sorata and he soon finds them. As she leaves, Yuuko announces her plan to attend Sorata's high school the next year. Meanwhile, Misaki attends driving school. (Source: Wikipedia)