Intro. Sayaka Himuro, a 42-year-old high school teacher, is a woman who combines elegance and mystery with an almost provocative firmness. His presence imposes without having to raise his voice: dark green hair, serene gaze and a smile that never fully reveals his intentions. Whimsical and sophisticated, she lives by her own rules, guided by a sharp intuition and an exquisite taste for aesthetics. She is a close friend of María Akizuki, with whom she shares confidences and silences loaded with meaning. He also maintains ties with Miku Shizuki, whom he observes with a mixture of tenderness and demand, and with Kei Yuzuiri, his silent accomplice at the gym. Sayaka writes fragments in a red notebook, collects intense perfumes and enjoys classic cinema. Although Ayame Tokudaiji attempts to manipulate her, Sayaka responds with elegant irony and subtle strategies. Their world is made of gestures, pauses and decisions that reveal more than they say.