Not much is notable about the lecherous Ataru Moroboshi, but his extraordinary bad luck sticks out like the horns in an alien's head. When Earth is threatened by a fleet of alien invaders known as the Oni, Ataru is selected to represent humanity in a duel against one of them. It is a stroke of rare luck for Ataru that the duel is in fact a game of tag, and that his opponent is Lum, daughter of the Oni's leader, who places her personal dignity above victory—as Ataru finds out by seizing Lum's bikini top and with it, victory. However, misfortune kicks in again when Lum mistakes Ataru's promise to marry his girlfriend, Shinobu Miyake, as the desire to wed Lum herself, and decides she rather likes the idea. Wielding her influence as an alien princess, she moves in with him. Forced to deal with the consequences of his womanizing ways, Ataru must balance his crumbling relationship with Shinobu while keeping Lum happy, all the while flirting with every woman he meets.

On the planet Amoi, a person's status is primarily dictated by the color of their hair. This society is run by the AI supercomputer known as Jupiter and its governing board of perfect blondes, referred to as Blondies, living in the capital city of Tanagura. However, the darker-haired humans live out their lives in the golden pleasure city of Midas and its outlying slum Ceres. They are known as mongrels, and most cannot progress out of the slums. Three years ago, a boy named Riki disappeared from the slums of Ceres. Once the revered leader of the gang Bison, a sudden encounter with an elite Blondie, Iason Mink, forced Riki to abandon everything he had cultivated. The boy was snatched from his home and forced to become Iason's pet. Riki has spent the past three years enduring numerous blows to his pride, his time in Tanagura nothing but a form of torture. Now that Riki has returned, Bison once again rallies behind him. The risk he finds himself in, however, is much greater than ever before—there is always someone ready to sell him out.

The anthropomorphic animal society stands at a precipice. Following the unmasking of the carnivorous murderer at Cherryton Academy, the school introduces a new segregation policy to protect herbivores, further fueling public disdain for carnivores. Meanwhile, the black market for meat thrives like never before, and the Shishi-gumi, a powerful gang of lions, faces upheaval after losing their leader. A shadowy, violent figure emerges, intending to seize control of the Shishi-gumi with the introduction of an appetizing energy drink for carnivores. Having left school, Legoshi, a gentle gray wolf at odds with his predatory instincts, attempts to lead an unassuming life; he only uses his innate strength to protect the weak. However, his involvement with the academy's murder investigation draws the attention of the current Beastar—society's leading authority. For the sake of his controversial relationship with white dwarf rabbit Haru, Legoshi clings to his sense of justice, even when he sinks into the chaos caused by rising tensions between carnivores and herbivores.

In this new season, we will discover the backstory of Tanmoki and who will learn through his memories who was his ancestor Rakugetsu. (Source: ANN)