Traveling in search of the rare ingredient, “sky fish” Meliodas and Hawk arrive at a palace that floats above the clouds. The people there are busy preparing a ceremony, meant to protect their home from a ferocious beast that awakens once every 3,000 years. But before the ritual is complete, the Six Knights of Black—a Demon Clan army—removes the seal on the beast, threatening the lives of everyone in the Sky Palace.
On an evening lit by a crimson full moon, an ordinary high school girl named Mei Ayazuki meets a self-proclaimed magician named Charlie at a festival. Through Charlie's magic, she time-travels to the Meiji era in Tokyo, where she meets and falls in love with various great historical figures from that time period.
Two years after the events of the Fourth Great Ninja War, the moon that Hagoromo Otsutsuki created long ago to seal away the Gedo Statue begins to descend towards the world, threatening to become a meteor that would destroy everything on impact. Amidst this crisis, a direct descendant of Kaguya Otsutsuki named Toneri Otsutsuki attempts to kidnap Hinata Hyuga but ends up abducting her younger sister Hanabi. Naruto and his allies now mount a rescue mission before finding themselves embroiled in a final battle to decide the fate of everything.
The atmosphere in True Cross Academy is lively and boisterous in the days leading up to the grand festival held once every 11 years. During this time, Okumura Rin is entrusted with the responsibility of suppressing the berserk Phantom Train. In the midst of his mission, he meets a devil whose appearance is that of a young boy.