Does Anyone Know What Manga Has?

There was a manga I read a while back, and I forgot it's title. It's about a girl who has to work while in school because her mother is in the hospital. Her landlord has a son, so originally referred to as "prince" (I think), and he "buys" her after she sees him beating up some people. "Prince" wears glasses and every time she takes off his glasses he blushes. At first she doesn't know him because she has amnesia from when she was kidnapped.... If anyone can tell me what the name of this manga

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