In the distant future, humanity has taken to the skies and colonized many planets throughout the universe. An agency known as the Galactic Organization of Trade and Tariffs (GOTT) has been formed to maintain order. Within GOTT, a secret squad of enhanced human beings—known as the ES Unit—carry out secret missions to put a stop to major galactic crimes. Two such operatives are the lowly C-ranked Éclair and Lumière. Despite being on the bottom of the totem pole, the pair wield formidable powers: Éclair's superhuman strength and lipstick whip and Lumière's ability to take control of any computer. Together, they can take on any mission that GOTT throws at them. But as they complete more and more missions, the duo begin to uncover a major conspiracy that leaves them questioning everything they know about themselves and the entire galaxy.

On the outside, Agastia is a firm specializing in entertainment, well-known for the theme park it operates. However, beneath such an exterior lies a monumental secret: Agastia is one of various highly advanced evil organizations that aim for world domination. Despite its true nature, the company boasts enticements that make it worthwhile to put up with the work environment. Led by its great leader Akashic, Agastia has recently become a frontrunner in reaching its fellow groups' common goal. Working for Agastia's Monster Development Division, Touka Kuroitsu is a researcher who primarily does fieldwork due to the eccentricities of her seniors. Kuroitsu's everyday jobs also include giving abrupt presentations and proposals, meeting ridiculous expectations for monster designs, and accompanying said monsters to face inevitable defeat by Agastia's enemies. Nevertheless, nothing will stop Kuroitsu from doing her best if it means getting the promotion she desires!

The class arrives in another world and they encounter a desolate environment dominated by a rampaging magical automaton.

Though hesitant, Miyo Saimori decides she is finally ready to attend a party with her fiancé Kiyoka Kudou. She has been practicing the etiquette needed for such an occasion with the help of Kiyoka's sister, Hazuki. At first, Miyo feels pressured by all the attention she receives; however, she eventually grows used to the unfamiliar environment and makes new acquaintances. Through these encounters, Miyo learns more about her family's past and the significance of creating connections with others.