On his way to school, Hiiro Ryuugasaki hears a strange voice coming from his storage shed. As he searches the place, he discovers a smartphone with the popular digital card game Shadowverse already installed. Under the assumption that his grandfather has finally decided to buy him a smartphone after countless requests, Hiiro finds nothing amiss. Later that day, Hiiro receives concerning news regarding his classmate, Mimori Amamiya. She has lost as yet another victim of Takuma Kibakura, a fellow Shadowverse player who bullies his opponents by seizing their phones after he defeats them in battle. Determined to retrieve Mimori's smartphone, Hiiro enters an exciting new world, filled with intense matches and fierce Shadowverse opponents—including the formidable Lucia Yonazuki.

Shamans are extraordinary individuals with the ability to communicate with ghosts, spirits, and gods, which are invisible to ordinary people. The Shaman Fight—a prestigious tournament pitting shamans from all over the world against each other—is held every five hundred years, where the winner is crowned Shaman King. This title allows the current incumbent to call upon the Great Spirit and shape the world as they see fit. Finding himself late for class one night, Manta Oyamada, an ordinary middle school student, decides to take a shortcut through the local cemetery. Noticing him, a lone boy sitting on a gravestone invites Manta to stargaze with them. Realizing that them refers to the boy and his ghostly friends, Manta flees in terror. Later, the boy introduces himself as You Asakura, a Shaman-in-training, and demonstrates his powers by teaming up with the ghost of six-hundred-year-old samurai Amidamaru to save Manta from a group of thugs. You befriends Manta due to his ability to see spirits, and with the help of Amidamaru, they set out to accomplish You's goal of becoming the next Shaman King.

Tatsuya Yoigoshi, a once nationally recognized soccer player, is now a first-year student at Noukin High School. Due to his developed hatred for sports, he has abandoned his previous aspirations to become a famous livestreamer on the internet. One day, Souma Azemichi, a first-year on the kabaddi team, seeks to recruit Yoigoshi and spontaneously interrupts his livestream. Without any expectations, Yoigoshi follows Souma to the school gym, where he witnesses second-years Kyouhei Misumi and Shinji Date engaged in the primal contact sport of kabaddi. Despite ridiculing the rules of play, Yoigoshi is stunned by the intensity of the round. Because of an enticing deal and slight coercion, he agrees to settle the prospect of his recruitment through the most invigorating way: a battle of kabbadi, a team sport played empty-handed.

In the world of Japanese ping pong, a mighty king has fallen. An underdog team suddenly breaks the indomitable Oudou Academy's nine year winning streak, creating a power vacuum as players everywhere are given hope that they too can reach the national tournament. Suzumegahara Middle School is home to a small-time team: Hanabi Tenka, who has a rapid attack style; Hokuto Itsumo, who can predict the ball's most likely path; Agari Kamiya, famous for her signature backhand smash; vice-captain Mune Oomune, who has an aggressive playstyle; and team captain Kiruka Ushirode, who possesses an impenetrable defense. Despite their skill at ping pong, the team has never made it further than the local city tournaments. But everything changes when transfer student Koyori Tsumujikaze arrives in town. Filled with an intense love of the game, she quickly makes a name for herself as another top player on the team. Koyori's positive attitude towards ping pong lights a fire in each of the girls' competitive hearts, and together they embark on a mission to win the national tournament.