Maroko Yomota, a young woman from the future, materializes at the Yomota residence aboard a time machine cloaked as a yellow Kodak blimp, declaring herself the unborn granddaughter of Inumaru Yomota. Her arrival fractures the family’s equilibrium, igniting hostility from Tamiko, Inumaru’s skeptical mother, while drawing cautious acceptance from Inumaru and his father, Kinekuni. Tamiko’s eventual departure heightens the household’s instability.

Maroko’s temporal trespass attracts the Agency of Time Administration, which dispatches agent Bunmei Miroto to apprehend her for breaching time-travel laws. The revelation that Bunmei is her future son—fathered by Inumaru—entangles their fates, deepening the family’s turmoil. Her dual role as both disruptor and kin weaves affection for Inumaru with strife, unraveling the family’s grasp of legacy and temporal continuity.

Guilt-ridden over tampering with history, Maroko maneuvers through the fallout: dodging temporal enforcers, mending fractured bonds, and confronting the blurred line between duty and desire. Her connection with Inumaru shifts ambiguously, intertwining devotion with flickers of romance—both stifled by the paradoxes her presence spawns.

Anchored by her identity as Inumaru’s descendant from a crumbling future, Maroko’s mission remains her sole disclosed purpose. The narrative concludes ambiguously, her fate suspended within the family’s unresolved timeline, shrouded in the echoes of choices yet to cascade through time.