of the school itself. Mizuki Himeji is the principal female character and one of the smartest students in Fumizuki Academy and would have probably ranked second in her level if not for her inability to finish her placement exam due to her fever. In Fumizuki Academy, leaving in the middle of an exam gets a student zero, regardless of the reason. As a result, Mizuki was placed in the worst class, Class 2-F. Despite the poor conditions of her class which were unfavourable to her fragile health, she claims to be happy because her love interest, Akihisa Yoshii, is in the same class. Mizuki is also portrayed as a shy, timid, innocent, yet ambitious young girl, with a very well-developed bust size (an 'F-Cup' in Japan; equivalent to a 'DD-Cup' in the US). Akihisa and Mizuki used to be in the same elementary school, and since then, she has long admired Akihisa for his thoughtfulness and caring personality. Mizuki also finds Akihisa cute, especially in maid costumes, and was overcome by some sort of weakness when she first saw him wearing a maid costume (when he was chased by Miharu and bumped into Hideyoshi who had some costumes with him). Towards the end of Volume 2, Mizuki changes her way of addressing Akihisa from to . At the end of Volume 8, Mizuki kisses Akihisa to get him to stay home while he is sick, despite Classes F and C having an exam war that day. Even though she has both brains and beauty, Mizuki's cooking is lethal, and in the novel anyone who eats her handmade cooking goes into a coma, including Hideyoshi Kinoshita who is known for his strong stomach. However, she is completely oblivious to the lethality of her own cooking because she does not taste her cooking, and as stated in the novels she adds several chemicals that will create even more potent acids such as the Aqua Regia and hydrochloric acid, also when asked by Yoshii when Yūji, Hideyoshi and Kōta went nearly out cold due to her cooking. She is on particularly good terms with Minami, calling her (by her given name), despite the fact that they are love-rivals. Often, she will emit a killing intent aura and yandere-like eyes whenever she hears that Akihisa is with some other woman, like when Yūji claimed that Akihisa was with a college girl. She will also