Adult people all over Japan had been captivated by 20th Century Expo, theme parks that reenacted good old days of the 1970s (the last days of Japan's high economic growth). One day the adults disappeared into the theme parks, leaving their children abandoned. That was a plot by Yesterday Once More, an organization who despises the 21st century and tries to bring Japan back to the 20th century with the dreams and hopes. Shinnosuke and his parents, Hiroshi and Misae, fight against the plot of Yesterday Once More in order to live together with family in the 21st century. (Source: Manabu Tsuribe)

Momoko Sakura is an elementary school student who likes popular idol Momoe Yamaguchi and mangas. She is often called Chibi Maruko-chan due to her young age and small size. She lives together with her parents, her grandparents and her elder sister in a little town. In school, she has many friends with whom she studies and plays together everyday, including her close pal, Tama-chan; the student committee members, Maruo-kun and Migiwa-san; and the B-class trio: 'little master' Hanawa-kun, Hamaji-Bu Taro and Sekiguchi-kun. This is a fun-loving and enjoyable anime that portrays the simple things in life. (Source: ANN)

The story is set in 1955 in Kokuga, Hofu City, Yamaguchi Prefecture. One thousand years ago it was the site of the ancient capital, Suo no Kuni, and traces of the Heian Period (year 794-1185) are passed down to us in the form of ruins and historical place names. The protagonist is Shinko, a third grade elementary school student, who was born and raised in one of the town's venerable families. She is a little girl whose characteristic is a strange curl on her forehead (she calls it her Mai Mai), and her love for playing in the fields. On the other hand, her secret joy is to imagine and to daydream about the world of one thousand years ago. Her fantasies travel far into the days of the Heian Period... One day, a girl called Kiiko transfers from Tokyo and enters Shinko's class. This girl from the big city has difficulty feeling at home in this small town, but gradually her friendship with Shinko deepens. Before long, the two of them become engulfed in a strange incident of one thousand years earlier...?!

Extra episode of Kowarekake no Orgel which was added to theatrical release of anime and DVD/BD. Flower notices that Keiichiro seems tired and decides to cook something new for him.