Shy and reserved younger sister Aoi. Usually absorbed in anime and games, she gradually develops a growing interest in erotic experiences influenced by her hobbies. Her relationship with her older brother slowly deepens throughout the story. While she boldly performs acts such as rimming her brother's anus, she still retains her naturally bashful personality. For her, the scene of a large, anime-style cock being inserted directly into her vagina is a fresh and thrilling experience. The fusion of her everyday otaku world with real-life sexual encounters highlights her unique charm.