An adventurous wild mouse called Gamba travels with his friends to see the ocean but he finds an injured mouse and hears about the violence of white ferret Noroi. Gamba decides to help the mice suffering under Noroi's tyranny.

During Japan's feudal era, there was a war between two ninja clans: the Byakuro and the Kabusu. One night, the Kabusu staged a fierce attack on the Byakuro castle in hopes of kidnapping the clan's infant princess. Their mission was foiled when a loyal ninja of the Byakuro flees the attack with the princess and disappears, eventually raising her to be a ninja. Several years later, six ninja trainees are given a mission to infiltrate the Kabusu-occupied Byakuro castle and retrieve a sacred scroll to complete their training. But their skills are put to the test when they encounter three members of the Kabusu, who use dark sorcery in an attempt to once again capture the princess - who happens to be one of the trainees. (Source: ANN)

It has been a month since genius orchestra conductor Haruo Hibiki was unceremoniously dismissed from his position at the Cosmopolitan Philharmonic Orchestra. Unable to find a similar position, the eccentric Haruo gets roped into teaching music at Kawagoe Private Academy instead. It is here that he receives an ultimatum: if he can put together a boys' choir at the school and win the annual competition, he can return to his former job. Desperate to return to the limelight, Haruo searches the entire school for suitable voices for the choir. Unfortunately, his inability to communicate normally puts him at odds with almost everyone he encounters—including Tenshi Dei, a boy who loves to sing but cannot do so in front of others. With only a year to complete this lofty goal, Haruo will need to learn how to get along with the boys he can manage to recruit while also supporting their growth into a formidable choir.

In the year 3990, the immortal Oldna Poseidal rules Pentagona, a war-torn solar system of five planets. Daba Myroad is a survivor of the Yaman Clan, just one of numerous native societies nearly wiped out by the tyrant. Living on the remote planet Koam with his friend Mirao Kyao, Daba possesses L-Gaim, a humanoid mecha known commonly as a Heavy Metal and the last known relic of the Yaman Clan. The pair befriend Fanneria Amu, an aspiring actress, and Lilith Fau, the last surviving fairy in Pentagona while on the run from a band of thieves attempting to steal L-Gaim. Daba promises to fulfill the dying wish of one of the thieves hunting him—an honorable act that leads him to the powerful merchant Amandara Kamandara. With their mission in sight, the ragtag group will face powerful adversaries and become entangled in a rebellion against Poseidal's reign.