星野步

身体虚弱，患有哮喘，为了疗养至山比古町来。

行为较女性化，确凿的男孩子。

Ayumu Hoshino is the adorable younger brother of Kazuma. An affectionate little boy, he moves with Kazuma into the countryside on behalf of his asthma and meek health, and like his older sibling, enrolls in school. Much like Kazuma, Ayumu is friendly, altruistic and gregarious. Of his many hobbies, Ayumu enjoys drawing.

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