S1.E4 ∙ Matsurowanu mono tachi

Ruby and Her Friends Went on a Trip to Sweet Princess Castle

A young Italian boy named Marco is devastated when his mother must leave home to work in Argentina to pay off the family debt. She sends the family letters, but soon the messages stop coming, which worries Marco and sets him off on an epic quest to find her.

A young panda prince is found unworthy by his mother the Queen, and expelled from the forest. In his journey, he battles dangerous enemies and gets captures and forced to work in a circus.

Kanata Mugen is the son of a famous space explorer. With the help of a Galaxy Pass, a robot parrot and the crew of the Bentenmaru (among others from the TV series), he tries to locate the will and the direction to his destiny.

Unable to endure the midsummer heat, Doraemon transports Nobita and his friends to a huge iceberg floating in the South Pacific. While creating an amusement parks with the secret tool "Ice-working Iron" the group finds a mysterious golden ring in the ice. Upon closer examination, they determine that the ring was buried in Antarctica 100,000 years ago - before people could have lived there. Doraemon and friends head to Antarctica looking for the owner of the ring and come across the ruins of a huge city buried in the ice. Using Doraemon's Time Belt, the group travels back 100,000 years ago and meets the young girl Kara who is connected to the mysterious ring. But now the group must fight for survival as Doraemon faces the crisis of the entire Earth freezing.

A sense of responsibility will arise in a boy through one's way of life.