Otone Hokke, the eldest of the five Hokke sisters, shoulders the burden of leadership for her siblings, orphaned and struggling in poverty following their parents’ sudden demise. Once operatives of a shadowy disbanded organization, their parents bequeathed a twisted legacy: a mandate to become "the ultimate evil," guided by Akumako, a mischievous imp freed from a cursed urn. Despite meticulous schemes to sow chaos, the sisters’ bumbling antics and inherent kindness thwart their ambitions, transforming their villainous pursuits into accidental acts of heroism.

A member of the Gedou Otome Tai, Otone commands aquatic magic as a magical girl while juggling part-time jobs to sustain her family. Her voracious appetite often punctuates interactions, adding levity to their dire circumstances. The sisters’ collaborative mischief—ranging from botched sabotage to misguided plots—repeatedly unravels into comedic farce, their blunders resolving community crises or aiding adversaries.

Otone’s resolve to honor her father’s dark vision clashes with her nurturing instincts, cementing her role as both protector and reluctant strategist. Yet their collective naivete and moral compass persistently eclipse malevolent intent, trapping them in a cycle of unintended virtue. Her story remains anchored to the core narrative, with no supplementary media expanding her arc beyond the sisters’ ongoing struggle to reconcile inherited ambition with their inescapable altruism.