This manga has an interesting premise. It's the story about two very close siblings: Shirou, the perfect and popular older brother and Masago, the plain and overlooked younger sister. The plot starts developing when Shirou dies protecting Masago from being ran over. At one moment, the girl is crying her heart out in his funeral; next thing she knows, Shirou is inside her body.The only one that they can trust with the secret is Korouma, Shirou's best friend and Masago's crush.
So far so good. The story promised some comical situations (imagine having your very protective older brother inside you when you're getting fuzzy with his
best friend) and also a dramatic dilemma: How long can they share a body before he has to go to the afterlife?
However, the development is poor and disappointing. Many subplots presented are left without a reasonable exploration and resolution (like Shirou's rivalry with his old classmate). This series were obviously cut short, and that's why when you reach the last chapter it doesn't feel like an ending to the story. Also, the dialogues are quite confusing at times with all the switches between Shirou and Masago, and many characters that seem important to the plot are left without any development or motives for their actions.
The art is nice and it's still a somewhat enjoyable manga, but hardly one that stands out.