In the year of 20XX, a young boy by the name of Netto Hikari receives a very special gift as he enters the 5th grade. His very own customized net navi, Rockman! Despite Rockman's small size and far more responsible personality, the two boys quickly become the best of friends. A net navi is designed to guide his operator from the inside of his or her PErsonal Terminal, or simply PET for short. Children and adults alike enjoy friendly "Net Battles", where they spar their navis against each other to prove their worth.

Due to the influence of someone who visited her town when she was a child, Princess Mikoto of Elua decides to become a hunter and search for treasure all over the land of Driland. She sets out on her journey with her personal assistant Wallens, but they are soon joined by Pollon, a hunter who dreams of being a hero, and Paan, a wandering knight. As they continue their exploration they begin to sense great danger drawing near.

In the future, age is not a factor to determine whether someone can perform a certain task or not, but special talent and training. An organization, Machine Robo Rescue (MRR), was established for robots and children to become partner and rescue people from danger. Then 12 children with various abilities were selected and introduced as part of this program: Robo Rescue! Meet Oozora Taiyou, one of the children who were chosen as a part of MRR program. After being late on his first day of training, he went to perform a hot rescue with JETROBO. However, a mysterious Robot from mysterious organization, "The Star"(?), appeared before MRR team to interfere with the rescue. What are the motives of the mysterious organization? And what are their goals? Life as one of the children chosen as part of MRR has started for Oozora Taiyou. Bumpy and hard training is just ahead for MRR team in order to protect many people's life!

Kazuki Yoshino and Yuuya Niyodo are idols who make up the duo ZINGS. While Kazuki gives his all in every performance, Yuuya views the job as just another means of making money. Yuuya's apathetic attitude toward the fans and inability to take his job seriously causes his manager to give him an ultimatum: unless he starts putting in more effort, he will be fired. Backstage, Yuuya meets Asahi Mogami, an idol dressed in a colorful costume. Asahi would have had a bright future ahead of her—had she not died a year prior. Even as a ghost, Asahi wants nothing more than to perform for fans again. When she finds out that Yuuya does not hold the same passion for the idol life that she once did, she is overcome by a fit of rage and demands that he let her take his place. In a strange twist, Yuuya wakes up to find that Asahi has possessed him and can do what he is too lazy to do himself. With Asahi performing for him, Yuuya thinks he has a ticket to an easy idol life. However, Asahi has other plans. Though she is no longer alive, she wishes for Yuuya to find the ambition that she still has. Together, she wants them to become the best idol the world has ever seen. But can an unmotivated man like Yuuya ever care about anything besides money?