Kono yo no Hate

Maria is in need of money for her sister, Nana's eyes operation. Because her day-time job doesn't pay enough, she works at night at a cabaret. When Maria and Nana were younger, Maria burned down the home, causing her sister's blindness and killing their father. Shiro is a famous concert pianist. However, he isn't happy with his marriage or life in general. Maria and Shiro are united through a traffic accident, causing Shiro to be hospitalized. Faking amnesia and his identity, he stays at Maria's place and eventually starts to work at the cabaret as a piano player. As you will find out later on, life was not meant for Maria and Shiro to find one another.