Yuito and Nagi are inducted into the Scarlet Guardians and meet their team members, each with their own psionic power. Soon after, they join the battle against invading mutants known as Others, but could there be more to the invasion than meets the eye?

Something goes horribly wrong with Naomi, leaving her comrades dazed and confused. It's clear there is more to it when they're told to keep quiet. Kasane divulges a shocking secret to Yuito, and the Seto and Kyoka platoons face an unexpected enemy.