《携手并进，共创未来》如果有妹妹就好了结局

　　The writer Pierre Carot became rich and famous with his book "Life as a Couple", which was based on the loving relationships of four couples. Now he's setting up his will and wants to leave his wealth to the couples among the four, which are still as deeply in love - if any: else, his companions get the money. He sends them out to visit the couples and test their love.