Having won the 63rd National Sensha-dou tournament, the girls from Ooarai High managed to prevent their school from closure by the Japanese Ministry of Education. However, new troubles loom on the horizon: a ministry official argues that the deal was not legally binding and that the Ooarai school carrier is to be decommissioned. Students and their families are frustrated with this injustice and overwhelmed with despair; it seems little can be done to save the school.

Their last glimmer of hope is a proposed match against the All-Stars University Sensha-dou team, consisting of the most talented students from all over the country. Despite Ooarai being severely outnumbered and clearly outclassed, they accept the challenge.

Murasame Sumika is popular in the high school for her excellence in the marks and sports. However, she has a secret: she is in love with her classmate Kazama Ushio. Ushio also has a liking to the love between girls, but she hasn't noticed Sumika's feelings and has always been refused by other girls.

When humanity is driven to the brink of despair by an alien threat called Pillars, a self-proclaimed god named Odin appears and bestows upon the people the power of "Valkyries"—battle maidens who pilot vintage aircraft called Hero Wings. Claudia "Schwertleite" Bruford is the ace of the European Valkyrie Wing. When Japan's S-class Valkyrie passes away in battle, Claudia is relocated to Japan as a replacement. However, with a dark record of being the sole survivor in every mission that results in being nicknamed "Grim Reaper," she suspects she already knows why she was chosen. Prepared to be shunned yet again, she arrives at the Tateyama Valkyrie Wing. Little does she know, her new comrades are a bunch of oddballs who have zero intention of accepting her dreadful nickname! [Written by MAL Rewrite]

Action Duels, which allow duelists to soar and swing alongside their Duel Monsters, are taking the world by storm. Due to an evolutionary breakthrough, the "Solid Vision" system is now able to provide Duel Monsters with mass. Yuuya Sakaki is Yuusho Sakaki's son, the latter being the founder of You Show Duel School in Miami City. Yuusho insists that duels are not a tool of war, but rather are to bring smiles to people and thus introduced the concept of Entertainment Dueling. However, at the height of his fame, Yuusho disappears and fails to attend his duel with Strong Ishijima, the Action Duel champion. Although scarred by this sudden leave, Yuuya vows to become an Entertainment Duelist like his father. Several years later, in the midst of a battle with Strong Ishijima, Yuuya's desperation to win brings forth a miracle. His pendant begins glowing, turning his cards into Pendulum Cards, which enables him to perform a Pendulum Summon—a summoning method unknown to the world and himself—gaining him fame overnight. As a result, Reiji Akaba, CEO of Leo Corporation and founder of the elite Leo Duel School, starts producing new Pendulum Cards to incorporate Pendulum Summoning into the system. Thus, the mysteries that surround Pendulum Summoning and Yuuya's father start to unravel, and Yuuya learns bit by bit what it takes to become an Entertainment Duelist. [Written by MAL Rewrite]