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Hayami is the daughter of doctors who charged way too much for medical exams, the people of the village revolted against them. She lives alone in an old train car and has a very poor life style. Hayami is bullied by several of her classmates, they have dubbed her "Cockroach" and she never fights back.
She first appears walking to school, she helps the main character escape from a wild pig and shows him the path to the school. Dispite her protest Hayami and Takuma get close she even shares her cup of noodles with him. Over time she even regains her friendship with the most popular girl in the school thanks to Takuma's intervention.
Hayami is a very tough girl but she is sad inside and wants nothing more than to be friends everyone.