讲述与9岁、19岁、29岁、39岁男女们有关的浪漫爱情故事，究竟主角们将如何扭转“逢九必衰”的命运属于他们的美好人生的故事。Follows the lives of a group of males whose ages are 9-years-old, 19-years-old, 29-years-old and 39-years-old.