Bashin is a first-year middle school student with a passion for trading card games. In fact, the game "Battle Spirits" was all the rage in primary school. One day, he meets J, genius card gamer and National Battle Spirits champion, and the two have a card game match. However, their meeting resulted in the powers sleeping within Bashin's pendant to awaken. Bashin discovers that the pendant possesses the power to transport him to the world of "Isekai", a place where "Spirits" who are summoned can materialise. ~ translated and adapted and from official site by Cranston