Shinobu Shinobe is a shy and kind-hearted high school girl who carries a secret: she is a descendant of the Kōga ninja clan. Her quiet world is turned upside down when a transfer student named Saku Iga arrives at her school. Saku is from the rival Iga ninja village, and Shinobu finds herself increasingly drawn to him despite the historical enmity between their clans.

Set in a modern-day high school where ancient ninja rivalries simmer beneath everyday life, the story follows Shinobu’s awkward and heartfelt attempts to get closer to Saku while navigating the complications of their shared heritage. Saku, for his part, seems equally interested in her, but both are hindered by pride, tradition, and the lingering feud between Kōga and Iga.

As the two teenagers fumble through their feelings, a more serious conflict arises involving a secret Iga document that ties into the old rivalry. This plotline comes to a head during the school’s culture festival, where the pair must confront both the external threat and their mutual affection. The manga spans two volumes, concluding with a resolution that brings their romance and the clan tensions to a satisfying end.