Kyousuke Kousaka

Kyōsuke Kōsaka (高坂 京介, Kōsaka Kyōsuke) is the main protagonist of the series. He has a distant relationship with his sister Kirino, who always treats him rudely. Feeling that this will never change, he adapts to her attitude by changing how he thinks of his sister, treating her like an acquaintance. Kyousuke's dynamics with his sister suddenly changes when he finds one of her adult games by accident and learns that she is an otaku. Through this, he tries to be a supportive older brother while realizing he himself knew very little about his sister, such as her being almost flawless at sc...