In ancient times, when the Chaos Cult summoned the God of Destruction, Magu Menueku, a fierce conflict erupted between him and humanity's protectors. To prevent catastrophe, the valiant Holy Knights imprisoned Magu within a sacred crystal. Millennia later, Ruru Miyanagi, an unassuming middle school student, unearthed the crystal while digging for clams. Unintentionally releasing Magu from his slumber, she greeted him affectionately as "Magu-chan." Despite initially being at her mercy, Magu sought to regain his lost powers and transform into a more formidable being. However, as he pursued this goal, Ruru's friendship with him deepened, providing insight into the world he intended to destroy.
Hakaishin Magu-chan was simulpub in English as Magu-chan: God of Destruction through MANGA Plus service. The volumes have been published digitally in English by VIZ Media since September 28, 2021.