High-school student Kyousuke doesn't get along with his cranky, dismissive, and secretive fourteen-year-old litter sister Kirino, but he suddenly finds himself forced to protect Kirino's secrets—she's not only a gorgeous fashion model, a track star, and an accomplished student, but she's also obsessed with naughty video games and little kids' fantasy anime! How can Kirino maintain her complicated lifestyle—and how can Kuousuke maintain his sanity? And might the tow of them, some how, just maybe, ever become friends?

Things are heating up at home for Kyosuke and his little sister Kirino! It’s getting difficult for Kirino to keep her love of kids’ anime and naughty video games a secret, especially from her nosy clique of popular girls and her stern, strict father! With all this chaos, might it be possible for Kirino to turn to her brother and really see him as a friend? Clever and engaging, Oreimo is full of surprises!