A timid middle schooler, Sendo Aichi, finds solace in his prized possession, the 'Blaster Blade' card, which ignites his passion for Card Fights in the popular game 'Vanguard' set in the realm of 'Cray.' Embracing this new world, Aichi befriends Tokura Misaki and Katsuragi Kamui while facing formidable rivals. Determined to challenge the enigmatic and skilled Vanguard Fighter, Kai Toshiki, who inspired his journey, Aichi tirelessly hones his skills. His ultimate dream is to prove his value to Toshiki through a thrilling Vanguard showdown.