Rini Amamiya was one of the boys ever since she was young, but suddenly she changed after 2 years when she studied in to a different school. She also hated the month of September very much for so many reasons that will happen to her by that certain month until he met his bestfriend again after 2 years of being apart. Will Hadori and Rini be the same as before? What will happen to the relationship between the two?