It is not strange that the Demon Lord's forces fear the Crimson Demons, the clan from which Megumin and Yunyun originate. Even if the Demon Lord's generals attack their village, the Crimson Demons can just easily brush them off with their supreme mastery of advanced and overpowered magic. When Yunyun receives a seemingly serious letter regarding a potential disaster coming to her hometown, she immediately informs Kazuma Satou and the rest of his party. After a series of wacky misunderstandings, it turns out to be a mere prank by her fellow demon who wants to be an author. Even so, Megumin becomes worried about her family and sets out toward the Crimson Demons' village with the gang. There, Kazuma and the others decide to sightsee the wonders of Megumin's birthplace. However, they soon come to realize that the nonsense threat they received might have been more than just a joke.
Shortly after the Inter-High of Kagami and Kuroko's second-year, a street basketball team from the USA called Team Jabberwock came to Japan to play a friendly match against a Japanese college-level street basketball team, Team Strky. Despite their best efforts, Strky is brutally crushed by Jabberwock. After the match, the Jabberwock players insult the players from Strky and all of Japanese basketball, claiming Strky's basketball was at the same level as monkeys and telling the players and crowds to quit playing basketball and kill themselves. As a revenge match, Kagetora assembles a dream team of all members of Generation of Miracles plus Kuroko Tetsuya and Kagami Taiga, along with bench players Hyūga Junpei, Takao Kazunari, and Wakamatsu Kōsuke, forming Team Vorpal Swords, with the hopes of reclaiming the pride of Japanese basketball.
