As others have noted, this drama is a bit confusing. At first I though putting a girl in a man's body was a way to get around any boys love hangups the audience or the actors may have had. In fact, when we get to the big kissing moment at the end, there's a cut from the two guys to the girl ghost who takes over the boy's body. But we do get a satisfying resolution in the end. Upon second viewing, there's a lot of subtext that comes to the surface about gender roles. One of the commonly noted benefits of close male friendships is guys are less inhibited about talking about their true feelings, as when Mai Ying Xiong reveals to Gu Si Ren what he really feels about his girlfriend, Lan Xi. The main problem with the plot is we're never quite sure who Gu Si Ren is supposed to be, himself in his previous life (having a man crush on Mai Ying Xiong) or the girlfriend as a ghost, inhabiting his body. The limbo scenes in heaven (?) are just time wasted. I would rather have spent more time with the man characters. But I give this drama high marks for the main two male leads who really sell the attraction of their characters. The mystery of the notebook is a nice touch.