On the morning of the fateful day, August 6, 1945, the sky over Hiroshima was high and the sun was shining as usual. Then, at 8:15, while no air raid sirens were sounding, the engine sound of a B29 bomber could be heard for some reason. "When the atomic bomb was dropped on Hiroshima, I was only 900 meters from the hypocenter, and a moment after the explosion I was in the middle of the mushroom cloud." This book contains a comic that depicts the tragedy of the atomic bomb based on the testimony of a survivor.