extremely embarrassing) situations (that are usually but unintentionally caused by either the twins or Mikazuki) and keeps his mouth shut about them. Her fondness for Keita grew noticeably when he 'tripped' during a race (actually hurting his leg a little) so that she could finish first and experience what it felt like to win a sporting event. Of the entire cast, Miharu is the only bespectacled female character. Later on, her feelings for Keita grow and she becomes more aggressive in pursuing him, much to the chagrin of Ako and Riko. Peppy and outgoing, Mikazuki Kiryu is a second-year middle school student and the younger sister of Yuzuki Kiryu. She enters her third year of middle school when Keita starts his first year in high school. She is much more mature for her age than her sister is, and tends to keep a mostly level head when her sister is losing hers. An underclassman to the rest of the cast, Mikazuki looks up to everyone, especially Keita, who she has a crush on. However, she seems to be just as interested in amusing herself by watching the antics and reactions of others as in actually winning him over. She considers her sister, Yuzuki, and Keita to be two of a kind, well suited for each other, and enjoys watching them try to act like a normal teacher and student. She becomes one of the few characters outside of Ako and Riko to discover that Yuzuki and Keita are secretly in a relationship when she bursts in on the two making out in Yuzuki's apartment. She seems to develop some feelings for Keita herself after the group trip to the beach. She also shares a certain genetic condition with her sister that is revealed when the girls take a bath during the beach trip. Yuzuki Kiryu is a recently hired 24-year-old homeroom and Japanese History teacher at the fictional Gakushū Senior High, and the older sister of Mikazuki. While she constantly berates herself whenever she makes mistakes, she is a caring teacher who can lay down the law when necessary but tends to get herself and others in trouble when she acts impulsively over perceived misconduct without finding out the full story. Single, unmarried, independent, and noticeably eccentric, she is initially disgusted with Keita and his relationship with Ako and Riko, to the point of unduly crusading against it. Ultimately, and