As soon as he entered high school, the first year student Koshiyama Shiki was invited to the mysterious Quiz Study Group led by his senpai. What will Shiki run into when being dragged along by his class mate Mari into the dazzling world of competitive quizzes?! (Source: Comic Walker)

Tokine Amino is the young and overburdened secretary of the CEO at a talent agency. One day while cleaning, she is suddenly transported to a strange alternate dimension ruled by a floating piglike creature. The creature, Hacchin, explains that this dimension is called Quizun, and transforms her outfit before stating that she cannot leave unless she solves a puzzle within five minutes. While Tokine manages to keep a mostly calm composure and solve the puzzle, Hacchin recognizes her talent and decides that the two will meet again. Now Tokine runs the risk of suddenly being transported to Quizun at any time, along with anyone who may be within her vicinity.

Sixteen sentient races inhabit Disboard, a world overseen by Tet, the One True God. The lowest of the sixteen—Imanity—consists of humans, a race with no affinity for magic. In a place where everything is decided through simple games, humankind seems to have no way out of their predicament—but the arrival of two outsiders poses a change. On Earth, stepsiblings Sora and Shiro are two inseparable shut-ins who dominate various online games under the username Blank. While notorious on the internet, the pair believe that life is merely another dull game. However, after responding to a message from an unknown user, they are suddenly transported to Disboard. The mysterious sender turns out to be Tet, who informs them about the world's absolute rules. After Tet leaves, Sora and Shiro begin their search for more information and a place to stay, taking them to Elkia—Imanity's only remaining kingdom. There, the duo encounters Stephanie Dola, an emotional girl vying for the kingdom's sovereignty. In desperation, she attempts to regain her father's throne, but her foolhardiness makes her goal unachievable. Inspired by the girl's motivation and passion, Sora and Shiro decide to aid Stephanie in getting Elkia back on its feet, ultimately aiming to become the new rulers of the enigmatic realm.

The anime adaptation revolves around a young boy named Faiya Orega who loves Oreca competitions. One day, he is granted the power to summon real Oreca monsters due to the mysterious powers of the treasure chest Pandora. To protect the peace of the Oreca world, Faiya must fight the demon king who threatens the land. (Source: Crunchyroll)