On an island, students compete in mind games to win stars.

With the ASTRAL game well underway, Sarasa's doppelgänger has a new trick: impersonating other players to take out whole teams; it may prove to be a game-ending threat for Hiroto's Eimei team.

After Hiroto eliminates himself from contention in the ASTRAL game, he sets his new plan into motion by involving an ally at Libra; can he master the concurrent MTCG game before Eimei gets wiped out in ASTRAL?

A triumphant Hiroto returns to the ASTRAL game, ready to take charge of his new army of allied academies; but their combined might may not be enough to take down Miss Hundred Faces and thwart Kurahashi Mikado's plans.

ASTRAL reaches its final day with only three participants remaining; after the failure of Hiroto's last plan, he must come up with a new one before Miss Hundred Faces can finish him and Sarasa off.