Natsumi Hayama
羽山夏美
1
Natsumi is Akitos older sister. In the first few episodes she is very mean to her younger brother and blames him for the death of their mother. Later a movie is released with a story quite similar to the Hayama household which is a wakeup call for Natsumi. Later she becomes much nicer to Akito and they start acting like a family again.
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