Riko, a real estate OL, felt suffocated by the strict compliance of modern times. "I wish I had been born in the more relaxed Showa era!" She fell asleep after venting her workplace frustrations, and the next morning, she woke up to find everything around her, from her furniture to her office, had reverted back to the Showa era! Riko is tormented by workplace harassment that would be unthinkable in today's world. However, she gradually becomes immersed in this atmosphere...