Sumire is the student council president and always manages to get the top grades in school; she is in fact a scholarship student and has horrible eyesight. She has a strong-minded personality which she depends on to be a figure those will follow. Her younger sister is Sakura and her parents own a supermarket.
Spoiler!She later studies abroad in America as she wants to become an astronaut, and because of this, she rejects Yūsaku's confession of his feelings, so that he will become a stronger person without having to lean on her.
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