Born into a new world after a life of stagnancy, Will awakens to the faces of a skeleton, a ghost, and a mummy. Living in the ruins of a city long fallen, the three raise Will as their own. The skeleton— Blood—teaches him to fight; the ghost—Gus—teaches him magic; and the mummy—Mary—teaches him religion and responsibility. Most importantly, they all teach him love. As Will grows up and learns about the world he was born into, he prepares for the day when he must finally set out on his own. For Will, this journey includes a lifelong promise. At their coming-of-age, every adult is required to swear an oath to the god of their choice, with the strength of the pledge affecting the degree of their sworn god's blessing. With his departure approaching, Will must prepare to accept the truth of his undead guardians and embark into a world that even they don't know the state of. Will discovers, however, that every oath must be fulfilled, one way or another.

Bullies often target someone frail and weak—someone exactly like Yuugi Mutou. His beautiful childhood friend, Anzu Mazaki, is always there to stand up for him, but he can't depend on her forever. Katsuya Jonouchi, who is almost always accompanied by his verbal sparring partner Hiroto Honda, doesn't seem like a bad person either, despite always bringing Yuugi trouble. But most of all, Yuugi wishes for a true friend who understands him and would never betray him. Yuugi treasures his Millennium Puzzle, an ancient Egyptian artifact that was brought into his grandfather's game shop. Believing that solving the puzzle will grant him his wish, he completes the puzzle, unleashing a new personality within him—the soul of the King of Games. Dark, twisted, strong, and reliable, the new personality named Yami Yuugi is the exact opposite of Yuugi. Upon any injustice toward him, Yami Yuugi takes over Yuugi's body and forces the opponent into a Shadow Game. The stakes are high as whoever loses shall have a taste of the darkness that resides within their own heart.

Hiyori Iki goes on a skiing trip with her parents and happens to bump into Yato and Yukine. After a short while, they find the other gods who are there for a company vacation. But amidst all the fun, someone is plotting a heinous crime, and Yato is the primary target. On a different day, Yato’s been able to make a small fortune from his last job and decides to take Hiyori and Yukine to Capyper Land. Although she agrees without knowing the destination, will Hiyori actually enjoy the day considering what happened on her last visit?

A.D. 2016, the foundations of humanity have been incinerated by the Mage King Solomon. Chaldea, a secret mages organization with the mission to preserve humanity's future, foresaw mankind's extinction in 2015. Thus commenced the operation to repair the Singularities in history caused by Holy Grails dispersed across time and space—Operation Grand Order. Using the Rayshift time travel technology, Chaldea's last master Ritsuka Fujimaru and his demi-servant Mash Kyrielight have traveled to and resolved six Singularities. Now, they depart for their most dangerous destination yet: a civilization in the Age of Gods, B.C. 2655 Mesopotamia. Ritsuka and Mash soon discover that Demonic Beasts roam the land, attacking people and towns. Amidst chaos and terror lies humanity's last defense—Uruk, a fortress city that acts as the frontline for the battle against the beasts. The battlefront is commanded by none other than King Gilgamesh, the King of Heroes, who sought aid from Heroic Spirits and took on the role of a mage to protect his city. Along with Gilgamesh and the summoned servants, Ritsuka and Mash must protect Uruk against the magical beasts' onslaught and defeat the Three Goddess Alliance who aims to eradicate humankind; all the while, a greater threat looms over Uruk, preparing for its awakening.