[DeepL Translation - needs review] Volume 1 Introduction: At the end of summer vacation. I was six years old and she was ten years old when my younger sister came crying to me. She came unusually close to me and held the cover of my diary in her hand. When our eyes met, she held it out to me and asked, "Tetsudai," in a husky voice. I knew that moment marked the beginning of the relationship between my sister and me. She was a crybaby, gutless, spaced out, friendless, and anxious, and I could...
