An unsociable Japanese schoolboy accidentally encounters a girl in bright yellow sneakers at the station and on the same day finds out that the owner of the yellow sneakers studies with him at the same school and seems to be stalking him. Who is she and what does she want from the boy?

An unsociable Japanese schoolboy accidentally encounters a girl in bright yellow sneakers at the station and on the same day finds out that the owner of the yellow sneakers studies with him at the same school and seems to be stalking him. Who is she and what does she want from the boy?