Those days in my memories were once innocent, once ignorant, once so immature, once so silly. At that time, did you also ride a crowded bus to school, once gnawed steaming sweet potatoes while waiting for the bus in the snow, and once secretly slept on the bedside? I have hidden novels or comics, I used a notebook as a cover to pass notes in class, I secretly heated the noodles seasoning in my father's teapot, I secretly had a crush on the boy riding a bicycle, I cried with my good friends, so many of them warmed us. . . . . Once. . . Warmth