Suugaku ♥ Joshi Gakuen(2012)

Suugaku ♥ Joshi Gakuen is a Japanese drama following Machida Nina, a mathematics prodigy who enrolls at a specialized math school to uncover the truth behind her elder sister's mysterious disappearance a year earlier. The series stars Hello! Project members including Tanaka Reina and Michishige Sayumi as "math girls" navigating both academic challenges and personal mystery. Developed with cooperation from the International Mathematical Olympiad in Japan, the show weaves genuine mathematical concepts, functions, and formulas into its plot and dialogue, blending mystery with educational content. As Nina investigates her sister's vanishing, she must rely on her mathematical brilliance and newfound friendships to solve the puzzle. The ensemble cast features current and former Hello! Project talent, bringing energy to this unique drama that treats mathematics as central to both storytelling and character development.