Kaijin Kaihatsubu no Kuroitsu-san怪人開発部の黒井津さん; Kuroitsu-san in the Superhuman Research & Development Department; Cik Kuroitsu dari Jabatan Pembangunan Raksasa; Kuroitsu-san en el Departamento de Investigación y Desarrollo de Superhumanos; Kuroitsu-san từ phòng phát triển quái vật; كورويتسو سان في إدارة أبحاث وتطوير البشر الخارقين; คุโรอิสึแห่งแผนกพัฒนาสัตว์ประหลาด; 怪人开发部的黑井津小姐; 怪人開發部的黑井津小姐; 괴인 개발부의 쿠로이츠 씨; Miss Kuroitsu from the Monster Development Department

Kuroitsu Tohka is a research assistant at the Monster Develoment Department of the evil organization Agastia. However, the enemies she must fight at present are not heroes. "Problems just before a presentation at a big meeting", "Proposals thrown together in ten minutes", "Impossible demands from the higher-ups"... As long as there is good in this world, there will also be evil. This is a tale of those who fight an unseen battle in the shadows of this standoff between good and evil.