The Mika - Hiro relationship is like high school dating , with the usual Jdrama touch , put on fast forward . Call me cynical , but I guess I do n't believe that sort of thing exists in real life , but people want to believe that it does , which is why the cell phone novel , the book , and the movie sold so well in the first place . It sells as an unconventional love story , yet in its core , it 's just another regurgitation of any other love story , and sort of like the one that Haruki Murakami writes of , that woman , or girls , want .

Question: Why do I think the novel Koizora was so successful ?
Answer: Because it 's so cynical , like in high school .Because it was first released on cell phones .Because it uses an appealing , if unrealistic , premise .Because it 's unconventional in its core .