Mana-chan loves factories and is a girl who loves studying at a technical school in the civil engineering department. In this strange environment where Mana-chan is the only girl in her class, she suddenly becomes sexually awakened and has sex all over the place, including in the school toilets, classrooms, the nurse's office, and the laboratory, with blowjobs, sex, and 7P orgies! I love factories, but I love sex even more!