The people of the kingdom look down on the young Prince Bojji, who can neither hear nor speak. They call him "The Useless Prince" while jeering at his supposed foolishness. However, while Bojji may not be physically strong, he is certainly not weak of heart. When a chance encounter with a shadow creature should have left him traumatized, it instead makes him believe that he has found a friend amidst those who only choose to notice his shortcomings. He starts meeting with Kage, the shadow, regularly, to the point where even the otherwise abrasive creature begins to warm up to him. Kage and Bojji's unlikely friendship lays the budding foundations of the prince's journey, one where he intends to conquer his fears and insecurities. Despite the constant ridicule he faces, Bojji resolves to fulfill his desire of becoming the best king he can be.

A large scale catastrophe is occurring across the planet. Ability users are discovered after the appearance of a mysterious fog, apparently having committed suicide, so the Armed Detective Agency sets out to investigate these mysterious deaths. The case seems to involve an unknown ability user referred to as "Collector," a man who could be the mastermind behind the incident.

Trust and courage are put to the test in order to save the city of Yokohama and ability users across the world from the grip of Collector where the Armed Detective Agency forms an unlikely partnership with the dangerous Port Mafia. 

[Written by MAL Rewrite]

The world's greatest exposition of the pirates, by the pirates, for the pirates—the Pirates Festival. Luffy and the rest of the Straw Hat Crew receive an invitation from its host Buena Festa who is known as the Master of Festivities. They arrive to find a venue packed with glamorous pavilions and many pirates including the ones from the Worst Generation. The place is electric. (Source: ANN)

In a city which should be familiar, there is the feeling of something a little different. Odokawa is a taxi driver who lives an ordinary life, taxing some quirky customers around. A slightly eccentric stranger who has no relatives nor any relations with other people, Odokawa's hobby is to listen to Rakugo on the radio before going to bed. For the time being, the only people he can consider as friends are his family doctor Gouriki, and his high school classmate Kakihana. Kabasawa, a college student who wants a buzz, Shirakawa, a nurse who's hiding something, comedian group Homo Sapiens, who isn't selling well, the city hoodlum Dobu, and the rookie idol group Mystery Kiss—the conversations with these people, which should not have meant much, lead to a girl who disappeared. (Source: MAL News)