He falls in love with a princess because of her beautiful zither music.  
He tries to conceal one of his many affairs by only visiting his partner when the stars are in just the right alignment.  He also adopts a girl with the premise of raising her as his own, though he did admit that he intended to later develop a physical relationship with the girl.  He falls in love with a princess because of her beautiful zither music.  One lady gets jealous at his many wives and transports her soul into the body of his main squeeze, Lady Aoi.  FTP, name this titular character of the world's first great novel.
He tries to conceal one of his many affairs by only visiting his partner when the stars are in just the right alignment.  
Genji