Aichi Sendou is a timid middle school teen. He is so shy that even conversing in class is a bit of a challenge. However, one thing him going through all his struggles - Vanguard. With his ultra-rare Blaster Blade card always by his side, he knew that at least in the gaming world he had a chance to be different.

Unfortunately for Aichi, his favorite card was stolen by a vengeful classmate. Furthermore, the Blaster Blade was later lost in a winner-takes all competition to one of the best players around his community. Now to retrieve his priceless card, Aichi is going to have to break from his mold of shyness and win his property back by finally engaging someone, and in this case a local champ, in an actual Vanguard card-battle! His first battle with Toshiki Kai was an eye-opener. It was part learning experience and part coming-of-age moment. And with that first battle and that unexpected first win Aichi was now on his way towards fully immersing himself in the world of the card game!