The year is 1989... becomes problematic for Japan, the economic crisis in the late 80s, begins to affect, the economic market collapsed, the yen fell, and many began to lose everything...

But those who died earlier from overwork (Karoshi) turned into cute but undead girls, nicknamed Showa-era Girls, but they had anger... hatred for Americans and the system in which they grew up... when the Heisei era arrived, the protests of these cute but angry undead Showa girls begin all over the country... Police in an attempt to stop this by getting bitten by their own deceased citizens who became Showa-era girls after their deaths. This becomes a trigger for society, the fight against the crisis...

The Japanese government loses control of the situation and the retribution from the undead girls ends on January 6, 1990, an event that finally changed the nation, pro-American Japanese officials in the government become the ones they ran away from... about Japanese.

Now it's April 14, 1990, unfortunately you couldn't escape the country and you were captured by them, these undead girls. They brought you into the lab to start turning you into a girl, one of them.

"An American... Hehe, now you can't escape our wrath, for our country!!!"