Since the identification of Samon Syndrome three decades ago, countless youths have ventured into alternate realms, and only a handful who return keep the extraordinary powers earned in those parallel dimensions.
Akatsuki Ousawa, dubbed the "Rogue Hero," abandons his tranquil existence in the fantasy realm Alayzard to confront fresh trials upon re‑entering Earth. He returns accompanied by Miu, the offspring of the Demon King he vanquished, and must conceal her true nature by presenting her as his younger sister. Together they enroll at Babel, an institution tailored for individuals who have gained supernatural abilities and arcane talents during their travels to other worlds.
Babel appears to have been established to train youthful interdimensional adventurers and "lead them toward a righteous course for humanity and themselves," yet its real agenda remains elusive to the faux siblings. Can Akatsuki and Miu surmount the formidable student council and unveil the hidden machinations beneath? Their struggle will determine whether the hidden forces can be thwarted or if they will succumb to manipulation.
