After receiving a text message offering to fulfill any of his wishes, high school student Gorou Ono successfully enacts his perverted fantasies with classmate Sawa Honoka. However, to his dismay, the granter of his wish materializes in the form of a demon named Lall. She informs him that he is now part of a game that will determine the next God of the world. As Gorou struggles to come to terms with this reality, Sawa attacks him with a giant sword, revealing that she also is part of this twisted competition for the divine throne. Every participant of the game receives a special power, and Gorou manages to kill his classmate with his ability: the Holy Book of the Fool. But this technique comes at a cost: Gorou's life gets worse every time he uses the book. As he learns more about this seemingly absurd competition, Gorou must find allies and learn how to use his newfound power before he loses everything.

In 19th-century France, the wife of vampire noble Jean Duchet Godard is murdered in her own home. With the local human authorities unwilling to properly investigate the case, Godard hires a pair of private detectives known to specialize in the supernatural: Tsugaru Shinuchi, a man with a mysterious birdcage; and his partner, Aya Rindou. This enigmatic duo has come from faraway Japan for one purpose—to track down the man who stole both Aya's body and Tsugaru's humanity.

From her hometown to her daily life on Kurken Island, everything surrounding Reisalin Ryza Stout is painfully ordinary. Despite being the daughter of a hardworking farmer, she would rather go on pretend adventures as she explores almost every corner of the island. However, the fact that it is against the local customs to venture off Kurken Island irritates her to no end. One day, wishing for something interesting to finally happen in her life, Ryza escapes on a boat with her two good friends: the bookworm Tao Mongarten and the aspiring warrior Lent Marslink. Arriving at a nearby forest, the trio stumbles into Klaudia Valentz, the daughter of a visiting merchant who also wandered off into the woods. As the naive and underprepared group ventures further, they run into dangerous monsters. Thankfully, they are rescued by the alchemist Empel Vollmer and his skilled bodyguard Lila Decyrus. This fateful encounter will lead Ryza to the key that will change her life forever—the creative and wonderful world of alchemy.

Polka Shinoyama's life takes a dramatic turn after being forced to use his magical powers in public. His divination cabinet attracts the attention of several people hellbent on exposing his true nature as the reincarnation of Corpse God, a necromancer from the Other World. To make matters worse, Polka and his friends are framed for the murder of one of their protector's employees. When group member Takumi Kuruya is abducted by his former boss, Kuon Higuro, Polka sends his most trustworthy ally Misaki Sakimiya to their friend's rescue. It turns out that some of the recent incidents the group finds themselves caught up in are interconnected, and Polka needs to be twice as careful if he wants to make it out alive from this maze of pitfalls.