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Yumi is Kazuma's mother. She met Toshiharu while working as a nurse at the hospital in which Tsubasa was treated for her skateboarding accident.<br /> She's young, nice and well-mannered, but she sometimes snaps, comically showing her true nature, which is why Tsubasa once told her "you remind me of a friend of mine" (referring to Yukino).<br /><br />