The time is the Edo period Kansei year.

Under the "Kansei Reforms" by Roujuu Sadanobu Matsudaira, the people's entertainment was severely cracked down. Everyday life is somewhat stuffy, like a bird trapped in a basket.

Meanwhile, the girls who live with their own worries.

At that time, history moves.

A man from current Japan explodes their thoughts as "idols!"

(Source: Official YouTube channel)