S1, E5: Tom is really a girl called Lisa, who has chosen to live as a boy so as to fulfill her ambition to paint. But hanging out in all male company can be a strain, especially when Leo never notices her interest in him - just as she herself pays little attention to Mac, who only has eyes for her. Then, Leo falls in love with Lorenzo's spoilt cousin Valentina and, as if this isn't bad enough, Valentina falls in love with Lisa in her male disguise as Tom. Romance has never been so complicated!