Koi no Jikan (2005)

Koi no Jikan 2005 / 恋の時間 2005 / Time for Love

When their mother falls ill, two sisters are faced not only with her extended care, but with the romances that spring from this change in situation. The younger sister, a married woman with children, falls for the man who found her mother in the park that day. The older sister is the president of her own company. She deals with both a man who (accidently?) assaulted her on the train and the doctor charged with her mother's care. The former keeps appearing in her life, always sad looking. He may seek a job in her company, since he recently lost his. The handsome doctor asked her hand in marriage, and she declined him. The story goes on... (Source: DramaWiki)