(from ebookjapan):
In the past, women were a minor part of the Japanese common man's life. However, at one point they have become a major presence. Wives especially became stronger and stronger. They started getting stronger when they discovered that men are gentle creatures. This work depicts the life of Haruko, a powerful and cheerful woman, at a time when wives became a major force in Japan!

Note: The two different spellings of Haruko in Japanese refer to the two Harukos in-story. The original tankobon (and the title pages in the digital edition by extension) use 超人晴子, while the digital edition covers use 超人春子.