 Janet and Chrissy are two girls who live with another girl but when she leaves they are in need of a new roommate who among other things can cook, which is what she did. The day following their roommate s going away party, they find that one of the guests, a man, who was so drunk, slept in the bathroom without their knowledge. His name is Jack Tripper and he is a culinary student, who s living in Y(MCA). They ask him if he would like to move in with them. He agress. But their landlord Mr. Roper doesn t agree until he is told that Jack s gay. So Jack has to pretend and allow Mr. Roper to think that he is gay, but it s difficult for a swinging guy like Jack not to suppress his interest in girls. After a few seasons the Ropers were spun-off into their own show. So, Mr. Roper sold the building and the new building manager is Ralph Furley, a guy who thinks himself a ladies  man. The following season, Suzzane Somers who plays Chrissy got into a little dispute with the producers and would eventually be written off, and to fill the void she left, the character of Cindy, Chrissy s cousin was added. The following season, Cindy left to go to college and they got a new roommate Terri, a nurse.