The main character of the series; she is really close to her older brother, Shinogu. At the beginning of the series she is a second-year student at Takazono High School, a private school. While Akane's fear of being pregnant leads Hatsumi into purchasing a pregnancy test for her, Ryoki accidentally sees her with it, and in exchange for that information's secrecy, Hatsumi becomes Ryoki's personal slave. She'll believe anything you'll say to her. She has a hard time getting over Azusa to move on when he dumps her in the beginning but later she starts to feel love again.