Tokyo Underground is a series that takes you beyond the end of abandoned subway tunnels, in the darkness deep under Tokyo City, there is a world sealed away, unknown to people above ground. In that world, people with power to control elements…rule. The story begins with Chelsea Rorec, a user of gravity, helping Ruri, known as priestess of life, who possesses the power of life over death.
To escape from underground to the world above. In the world above, they met Rumina and Ginosuke, who helped them from the ever ending waves of assassins sent from underground. During one of the fights, Rumina as killed and then resurrected by Ruri's power. After Rumina reawakens, he somehow gained the power to control the element of wind. When finally those sent from underground were too strong for both Rumina and Chelsea Rorec, Ruri, in order to save them, decided to go back to where she came from. Rumina and Chelsea, determined to save Ruri from the grasps of the underground, trained to become stronger and begain their journey below Tokyo…