Monster Mania

From the beginning of all, there were battle gods called "Gourikishin" who team up with human partners they revere as "Oyakata" as they go through battle called "Kamizumo". Now in the present, an elementary student named Dai Mugen encounters one god name "Koutetsu" who fell from the sky and ask, "Please become by Oyakata and together let's kamizumo!!"

Basketball, Baseball, Soccer… When it comes to handling a ball, Cha Youngwoong, a fifth-grade elementary school student, exhibits overwhelming abilities. One day, while cleaning out the warehouse at the request of his mother, he discovers a mysterious marble. At that moment, the villain duo "Team MABORI" and the monster creature 'Pachyla' appear to break the warehouse and threaten the hero, but With the help of the Mechanimal 'Akan' hidden in the warehouse, he uses a mysterious orb - 'Mecard Ball' to succeed in defeating them.

After the kingdom of Crystalia is plunged into a deep darkness by Yodonheim, the army of darkness. Princess Mabushina, comes to Earth with the Kiramai Stones to find individuals with strong "shining spirits" to become the Kiramagers and fight against the Yodonheim Army.

Den City is a city with advanced network systems in which a VR space called LINK VRAINS was created by SOL Technologies. The Knights of Hanoi, a group that hacks through dueling, as well as SOL Technologies are seeking a mysterious AI program. Yusaku Fujiki, also known as Playmaker, is a first year high school student who manages to capture this AI program while trying to find out the truth about an incident in the past.

It is the year 2030, and the stage is the capital of Japan, Chou-Tokyo. Through "Buddyfight", humans have started cultural interactions with residents from other worlds called "Affinity Dimensions". Buddyfight is a game with selected humans as the "Buddyfighter", and residents from the other world as the partner (known as "Buddy Monster"). These battles have high significance and sometimes it is even used to decide the fate of a nation, and naturally there are those who seek to use the Buddy Monsters for evil purposes.