People's lives have changed because of VR and AR, and an competitive sport has born from these technologies called CB (Circlet Bout). CB can be competed between two schools and became an e-sport that decides the wealth of the schools. It also became the real ability of the school, which depends on not just the students' academic skills, but also on the data based on the sport ability, art, skills, etc.
A desolate land stretches out from the city of poverty. A motorcycle speeds recklessly, blowing clouds of sand and dust. The rider is the protagonist of this story – he has neither a name nor a past. All he has is his ring name, “Junk Dog” and a technique for rigging MEGALOBOX matches with his pal Gansaku Nanbu, which they use to support their hand-to-mouth lives. JD is bored, resigned, and unfulfilled. Yuri has been the reigning champion of MEGALOBOX for the past few years. He has the skills and presence of a true champion. This is a story of JD and his rival, Yuri.