Second season of Monster Strike, animated entirely in CG. A transfer student from America, Mana Livingston, becomes friends with the main cast and learns about the Monster Strike game, even obtaining her own ring and partner. Together everyone helps solve crises involving the energy points that draw monsters in random areas of Japan. By sealing them the monsters will stop being drawn to them. But Madarame, a CEO who reaches out to the children, is not telling them the whole truth.

In the year 3990, the immortal Oldna Poseidal rules Pentagona, a war-torn solar system of five planets. Daba Myroad is a survivor of the Yaman Clan, just one of numerous native societies nearly wiped out by the tyrant. Living on the remote planet Koam with his friend Mirao Kyao, Daba possesses L-Gaim, a humanoid mecha known commonly as a "Heavy Metal" and the last known relic of the Yaman Clan. The pair befriend Fanneria Amu, an aspiring actress, and Lilith Fau, the last surviving fairy in Pentagona while on the run from a band of thieves attempting to steal L-Gaim. Daba promises to fulfill the dying wish of one of the thieves hunting him—an honorable act that leads him to the powerful merchant Amandara Kamandara. With their mission in sight, the ragtag group will face powerful adversaries and become entangled in a rebellion against Poseidal's reign.

One spring, a teenage boy suddenly started seeing strange "things" that are apparently invisible to others.

Episode 0 of Madan no Ou to Vanadis: Tigre-kun to Vanadi-chu.