My friend wrote a manga.

A shoujo romance set in edo era japan. Ayano Maehara, an inexplicably blonde orphan living in poverty, is unloved by the family that takes her in, but at 20 she meets an old rich guy who gets her to move in and tutor his two younger sons. (His oldest son is 23) She falls for his oldest son Takeshi, but a terrible secret threatens to disturb their relationship.