Akira Koizumi is a high school student with striking blue hair and red eyes, known for her petite frame and forceful personality. She has a strong aversion to men, whom she views as shallow, and reacts to unwanted advances with physical violence. Her primary target is persistent classmate Keisuke Saji, whose relentless pursuit she constantly rebuffs with beatings and cold behavior. Despite her public hostility, genuine affection for Saji gradually grows; she becomes jealous when he pays attention to other girls and does nothing to dispel rumors that they are a couple, hinting at hidden feelings. Their dynamic begins when Saji discovers her secret participation in a phone prank circle, where she posed as “Alice” to lure men to public locations for amusement while carefully avoiding sexual encounters. To ensure his silence, she spends an evening with him that culminates in her losing her virginity. Deep-seated low self-esteem and distrust of others drive her to push people away and live independently, but Saji’s authentic affection chips away at her emotional barriers. Over time, she learns to lower her defenses, acknowledging that she acts differently when he is around and eventually admitting he is important to her. Along with her friends Ryoko and Maki, Saji becomes a reason she decides to stay in Japan rather than isolate herself further. While she continues to react violently to his perverse actions, she also possesses a covertly perverse side, occasionally engaging in teasing or suggestive behavior that easily embarrasses her.