Mysterious cards came down from the sky one day. Capable of summoning powerful creatures from another dimension, they became the centerpiece of a new game called Bakugan. The game gained instant popularity among children and teenagers, with the best of them competing in a worldwide ranking. Meanwhile, war for domination over Vestroia, the homeland of Bakugan cards, rages on. Invaded by the White Dragon Naga and his servants, the Doom Beings, the realm becomes increasingly destabilized. Dimensions begin to merge and many Bakugan players come to realize that their pastime is not merely a game. Danma Kuusou, one such Bakugan player, intends to become the World Ranking's leader someday. However, during one of his fights he experiences a vision of a clash in Vestroia. The fight suddenly moves to Earth, where Danma comes into possession of a talking, mighty fire Bakugan, Pyrus Dragonoid. He soon gets dragged into the conflict, and together with his Bakugan Brawlers team, must traverse the dimensions and restore balance in a ravaged world. [Written by MAL Rewrite]

In a future governed through the lens of a camera, where people eat synthetic food and pursue an online existence in lieu of physical contact, a group of children begin meeting up in the real world. The aloof Ayumi Kono, the genius hacker Mio Tsuzuki, and the socially awkward Hazuki Makino set out to find the fourth member of their group, Yuko Yabe, who has gone missing. With the help of Myao Rei, an unregistered citizen proficient in martial arts, they are able to find Yuko. However, when their situation takes a sudden turn for the worse, the group stumbles headlong into a dark mystery that challenges everything they know about their world.

Haruno Kasumi is a fourth-grader. Her parents are zoologists who went over to Africa to carry out their research studies. In order to see off her parents, Kasumi arrived at Kasumi Town. In the middle of the town lies an enormous mansion surrounded by the forest. The mansion belongs to the Kasumi household, the family in which Kasumi will be lodging in and taken care of. There is a mysterious aura about the mansion and Kasumi discovers a series of talking appliances. The Kasumi family refers to these creatures as "Henamon". In return for living in with the family, Kasumi will be helping out with the household chores such as cooking and washing. Surrounded by various interesting characters, Kasumi begins a new chapter in her life.

In a thoughtless blunder, God accidentally strikes down Touya Mochizuki with a stray bolt of lightning! As an apology, God offers him one wish and the chance to live again in a magical fantasy world. Touya happily accepts the offer and, for his one wish, asks only to keep his smartphone with him as he begins his journey into this mysterious world. Starting over in this new world, Touya finds it is filled with magic—which he has an affinity for—and cute girls vying for his attention. These girls—the twins Linze and Elze Silhoueska, Yumina Urnea Belfast, Leen, and Yae Kokonoe—provide Touya with no end of romantic frustrations, but also companionship as he discovers the secrets of this new world. [Written by MAL Rewrite]