When five lovely young girls who hate studying hire part-time tutor Futaro, he guides not only their education but also their hearts. Time spent has brought them all closer, with feelings growing within the girls and Futaro. As they finish their third year of high school and their last school festival approaches, they set their sights on what’s next. Is there a future with one of them and Futaro?
Cafe Kurokoneko-tei. It is a coffee shop located in a corner of the 5th district of the Imperial Capital. Working there are girls who are autonomous mechanical dolls (automata), the culmination of the best of technology. The Great War just ended a few years ago. The girls were created as weapons there. Eventually, the peace that followed the war arrived. Restored to look as good as new, dressed in shiny kimonos They are looking for a new role, and singing in high spirits. Wouldn't you like to spend a wonderful time with them?
The year is 2062. Earth has been left in ruin after the failure of a labor automation project when the AI called Artemis waged war against humanity. A girl, Empress, awakens in a research lab. As one of the three surviving guardians, she must destroy the Orbital Elevator before Artemis can complete its construction. Failure will result in a machine army overrunning Earth.
Fuutarou Uesugi is a poor, antisocial ace student who one day meets the rich transfer student Itsuki Nakano. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.
Grotesque, strong enemy called Siren has suddenly appeared from the sea. In order to fight against them, a group of army Azure Lane has formed. They were successful in stopping the attack from Siren for a moment using warships, the different ideals from the people who formed it has shown. The story is about girls fight the strong enemies that they never face while dealing with the trouble in each camp.