Haru, a free-spirited skater, has always felt like a misfit in a world where she’s constantly told how to behave. One day, Haru meets T.K., a mysterious man sitting next to a vending machine, waiting for someone to appear.

Two sisters, Shao and Raizan, grow up together in the Alley, relying on each other to survive. But one day, Raizan vanishes. Shao searches for her, but years pass with no success. Then, carrying her sister's sword, Shao stumbles upon a mysterious torii gate and enters the unknown world of the Garden.