Aichi Sendou is a timid and mundane third-year middle school boy. The thing that supported Aichi's heart, was the "Blaster Blade" card that he received as a child. It's an important rare card from "Vanguard", a card game with the imaginary world of "Planet Cray" as its stage. From the day he reunited with the person who gave him that card "Toshiki Kai", Aichi's everyday life began to change. While expanding his horizons and meeting many different fighters, Aichi has a mysterious experience of hearing the voices of units from Planet Cray--- that closely resembles Psyqualia, the power held by "Ren Suzugamori", the leader of Team Asteroid. It's a youthful story of vanguard fighters who clash passionately with each other through fights.