As a child, Uta—the Red Hair Pirates' ex-musician and Monkey D. Luffy's childhood friend—promised that she would build a new era of freedom by performing joyful music for the world. Luffy and the Straw Hat Crew arrive at Uta's first ever live concert, where many fans have gathered to enjoy the diva's otherworldly singing. Due to a childhood trauma, Uta bears a deep-seated hatred for pirates; her happy reunion with Luffy is cut short when she learns that he has since become one. Luffy's refusal to change his ways results in Uta unleashing her powers on the Straw Hats. The crew soon learns that their minds have already been trapped in Uta's dream world since the beginning of the concert, while their unconscious bodies remain asleep in the real world. With time quickly running out, the Straw Hats must find a way to escape the nightmare or be trapped in Uta's dream forever.

For citizens of the Ken Empire, justice is a myth. Lord Keiro, the deranged Shogun of the Imperial Army, blazes a trail of terror across the countryside in search of the sacred sword that will make him a god. Standing in his way is Taito, an omnipotent star reborn in human form—a young hero who vows to use his celestial strength to avenge those slaughtered by the villainous Shogun. Taito's mystical powers steer him toward a violent showdown with Keiro, and if used recklessly, his newfound abilities could shred the very fabric of his being. To master the art of control and become a heroic martial artist, Taito must seek the guidance of others like him: the seven star-born warriors with the strength to shatter a corrupt empire.

Saito High is a high school with its spiritual beings and a principal whose hobby is collecting occult paraphernalia. The school has the prophecy-chosen members of the Holy Student Council to protect it. These students have problems of their own; Haruto Houjo, the president, has a way of summoning spirits, and would resign from his duty for a normal life if it weren't for the principal. Kazumi Ryodo, the next member, is good at being possessed and has something for the Hanako. The last member is Mutsuki Asahina, who is a master of exorcism and is attracted to small boys. Unfortunately, these three are in charge of keeping the school in line and defending the world from supernatural beings, and this mission brings them through wacky predicaments.

Second season of Muhyo to Rouji no Mahouritsu Soudan Jimusho.