After a few months from the electrifying finale of the Asia Circuit Cardfight Vanguard contest, Aichi Sendou"s enthusiasm for the well‑known card game is fiercer than ever. Yet when he enrolls at the esteemed Miyaji Academy—a private school that prioritizes both academics and athletics—he feels let down as classmates brand his beloved pastime immature.
Despite the lukewarm welcome from peers—and the student council"s firm resistance—Aichi resolves to form a card‑fighting club, establishing a refuge for fellow duelists on campus while meeting the school"s extracurricular mandate. By gathering old and new friends, Aichi and his teammates confront a series of obstacles as they strive to secure official recognition for their club for the community and support.