The story took part in a new place called Chrome City, is a very popular place in global. Even a popular place, they have their own history and ancient ruins. They were said they didn't response to the WBMA's call for exchanging information so it full of mysteries.
After the Phoenix Grand Prix, there's a strange thing happened. In the city, there's eleven ruins which they called "Dragon Ruins". They are located everywhere in the city. Deep inside the ruins, there's a element like statue representing a dragon and it is located in every ruins. After the Grand Prix, the elements are shining and letting out a strange sound and waveform. The WBMA received the strange waveform, so they are planning to have a Exhibition Tournament in Chrome City to
negotiate with the Symphony Company who are the one ruled over Chrome City.
Riki and his friends (include Es 's characters too) participant
in the tournament, when they are lost in the city before the tournament starts they met a mysteries girl and she helps Riki them to the battle
arena. When Riki was going to thank her, the girl suddenly disappears and appears in the battle arena briefly which cause Riki thinks he's seeing thing.
After that is just the very happening of everything that will happened to Riki them.
