Second season of Tate no Yuusha no Nariagari. Naofumi Iwatani, an easygoing Japanese youth, was summoned into a parallel world along with three other young men from parallel universes to become the world's Cardinal Heroes and fight inter-dimensional hordes of monsters called Waves. Each of the heroes were respectively equipped with their own legendary equipment when summoned. Naofumi happened to receive the Legendary Shield, the sole defensive equipment, while the other heroes received a sword, a spear, and a bow, weapons meant for attack. Unlike the other heroes who are fully supported by the kingdom and gain several strong allies each, Naofumi's luck turns to the worse after his single companion, revealed to be the kingdom's Princess, betrays him, steals all his belongings, and leaves him devoid of all assistance and supplies after she falsely accuses him of sexually assaulting her.

The war that raged between the Church and the Witches for five centuries finally ended in peace but a few short years ago. However, nestled in the shadowy places of the world, the embers of that age old conflict still smolder. Attending the Royal Academy of Magic of the Kingdom of Wenias is a struggling student named Sable, who has no memories of his time before being enrolled. At the command of Headmaster Albus, he left the Kingdom to travel to the southern reaches of the continent, where anti-magic insurgents are still a force to be reckoned with, as part of a special training regimen. Accompanying him are a party of individuals strong in both ability and personality; there's the one known as the Witch of the Dawn, Roux Cristasse, who seeks the forbidden knowledge of primeval magic in the 'Grimoire of Zero,' the genius girl Holtz, as well as the school's sole beast, Kudd. Just what truth shall they uncover in their journey to the south...?

Three oni-kids who, through the power of the onipan (a portmanteau of "oni" and "pantsu") become human to help fix the relationship between humans and oni. The three girls transfer into a normal Tokyo high school to aid in their task and help fix their image by revitalizing the town, sometimes jumping headfirst into school events, and other times ... becoming idols!