"Onii-chan," said a nostalgic voice. The owner of the voice is Natsumi, her childhood friend who lives in the neighborhood. Natsumi, who was three years old, was a friendly girl who was always smiling by my side. She wasn't cocky, but she liked me. Natsumi, who I met again when she returned home for the first time in five years, was much more mature and sexy than the Natsumi in her memory. It was the moment when she became aware of Natsumi as the opposite sex for the first time. But Natsumi already had a boyfriend. So I...
