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.