Limited lovers manga

Limited Lovers summary:

From Esthétique : Kakinomoto Karin, the daughter of a millionaire, lost her ability to walk in an accident. During her stay at the hospital, she fell in love at first sight with the medical researcher, Okita Teppei! She bought him a house, but only on the condition that that Teppei spend two hours with her every day. Karin, who only wanted Teppei's heart, will one day find out that not only does Teppei already have a fiancée, but he has a frightening split personality... !