The era is A. D. 994, Heiankyo. Norimitsu Tachibana decides to go on a blind date at the behest of his parents. His reluctant arranged partner turns out to be Kiyohara Nobuko (later known as Sei Shonagon), who is so violent that you wouldn't expect her to be a daughter of an aristocrat! Nakoko's quick wit and energy are praised, and she is invited to the royal court, but even there, Nakoko causes chaos in the palace! A heartfelt work that depicts the genius essayist Sei Shonagon with a highly original interpretation! !

The time is set in the Mechatronics Era in the future. In this era, schools actually float in the Tokyo sky at around 2000–3000 meters. At home, there is freedom in movement as everyone has a flight mechanism within them which allows them to fly. Transportation is made easy as a result. Source: ANN

Two mysterious tough guys, Ryuji Hoshikawa and Kyotaro Ochiai, win money at the track but have some of their winnings swindled by Tetsu, a member of the Hyakkikai posing as a car dealer. Mr. Makimura, an elderly fish seller, cannot pay off his debts to the Hyakkikai so he jumps in front of a car being driven by Ryuji and Kyotaro but they stop in time and help him by robbing a Hyakkikai gambling den and giving him most of the money in order to repay his debt. From wikipedia