Noriko Takase, the protagonist’s cousin and daughter of Shino Takase, is a first-year student at Shirosakura Jogakuen known for her cheerful, sociable nature. She frequently uplifts the protagonist with unwavering support, initially framing their bond as sibling-like, devoid of romantic undertones. Her passion for piano, cultivated under her mother’s guidance, reflects her artistic skill and dedication. This dynamic fractures when the protagonist exploits her trust through hypnosis, warping her emotions to provoke a romantic and sexual awakening she had never contemplated. Her manipulated devotion culminates in her willingly surrendering her virginity, with some narrative paths leading to her pregnancy. A parallel thread reveals the protagonist’s paranoia: he uses hypnosis to erase her memories of a boy who defended her from harassment, fearing her potential affection for the rescuer. This act exemplifies his ruthless control over her autonomy. Noriko’s appearance features brown twin tails with sidelocks, bright blue eyes, and a slender teenage build. She is commonly illustrated in casual hoodies or school uniforms. Across media, her arc consistently portrays the psychological toll of hypnosis-driven manipulation, emphasizing her victimhood and its enduring emotional repercussions.