Upon meeting for the first time, undefeated street fighter Marcus Damon and renegade Digimon Agumon become friends in the most natural way possible for the knuckleheaded duo—by fighting their hearts out. The self-proclaimed "ultimate team" are recruited by a secret government organization called the Digimon Data Squad, or DATS, who had witnessed an unbelievable human fighting blow for blow with a Digimon. Their primary objective is investigating mysterious problems caused by Digimon entering the real world, and the world is currently in the midst of a crisis with Digimon appearing at an unprecedented rate. Embarking on various missions with DATS, Marcus and Agumon become colleagues with adolescent genius Thomas H. Norstein and his Digimon partner Gaoman, along with the kind-hearted Yoshino "Yoshi" Fujeda and her Digimon partner Lalamon. As the group continues to investigate the rapid increase of Digimon in their world, a darker truth begins to surface, and it is up to Marcus, Agumon, and their friends to get to the bottom of things. [Written by MAL Rewrite]

In the year 2020, technology is everywhere. Every digital device around the world is connected by a singular network where data travels. Unbeknownst to humans, this network has become home to life forms known as "Digimon." Fifth-grader Taichi Yagami is preparing for summer camp when strange occurrences begin in Tokyo; certain electronic systems have started going haywire. When he discovers that his sister and mother are trapped on an unstoppable train, he rushes to the nearby station. Suddenly, Taichi is transported to another world where he meets a strange creature by the name of Agumon, who somehow already knows his name. Taichi also receives a strange device called a "Digivice," which allows him to communicate with the undigitized world. Taichi discovers he is in the "Network," and virus-like Digimon are attacking the areas that maintain Tokyo’s electronic systems. It is up to Taichi and his new partner Agumon to stop these cyberattacks before the whole world is threatened by the actions of mischievous Digimon.

A story set in the dream world, depicting the Kasukabe Defense Forces and the Nohara Family fighting against a nightmare trouble. One day the people in Kasukabe come to be able to have dreams they want in their sleep, after having a strange dream in which a giant fish swallows them. The people enjoy having their own distinctive dream in the dream world, but the world gradually changes into a nightmare world. Shinnosuke Nohara and Kasukabe Defense Forces members let Saki Nubatama, a girl who moves in Kasukabe, join the group, and they go into the dream world to explore the cause of the nightmare.

(Source: Manabu Tsuribe)

Based on the book by Tony Wolf. The Fountain of Life is the source of all life forces in the Bosco World. Princess Apricot, who is supposed to become Queen of Fountainland-the Guardian of the Fountain of Life-is kidnapped by villains who aim to rule the Bosco World. If Princess Apricot can't take the queen's throne by the next solar eclipse, the Fountain of Life will dry up. The animals living in the forest of Bosco, including Frog, Otter and Tortoise, decide to help Princess and take her to Fountainland in order to protect their peaceful life in the Bosco World. So begins the journey in a balloon full of dreams, hope, adventures, and love! Source: Official Website)