Humanoid Puppet

永井豪のホラー劇場　マネキン

Also known as Nagai Go no Horror Gekijo: Mannequin

A student girl, derided and continually persecuted by her classmates, is preparing a mannequin with a suit of her own creation for a fashion contest; her classmates are envious because the girl is really good and so they decides to damage both suit and mannequin.