[Tousyoku] Girls School Mechanization Manga 1-7

An ambitious student discovers that her teachers have been secretly turned into cold, machine-like beings, prompting her to investigate a hidden agenda that remodels the entire school into a seductive, mechanized harem. She allies with fellow students—club heads and council presidents—who undergo shocking transformations, their bodies reshaped into exaggerated, robot-like forms with luminous eyes and insatiable desires. As the mechanization spreads, the line between friend and foe blurs, and the protagonist must decide whether to submit to the seductive control or resist the corrupting power.