In the most intense period of World War II, in a quiet American town, people called an 8-year-old child "Little Boy". He has never grown tall, but he is not dwarfism. The doctor gave him this nickname half helplessly and half comfortingly. He was bullied by his peers, and his father was his only friend. The war is approaching. Because Little Boy's brother has flat feet, his father must join the army. Little Boy has lived alone since then, and his only hope is that his father can go home soon. One day, he occasionally heard the priest say that as long as he has a faith the size of a seed, he can move the mountain and fulfill his wish. This sermon made Little Boy fall into a demon, and he felt that he could use his beliefs to get his father back to his side. Seeing all this, the priest wanted to help him, so he made a list of good deeds for him, including providing shelter for homeless people, visiting patients, etc., and told him that if he did it all, he would realize his wish. In the small town, Hashimoto, a Japanese expat who has immigrated for decades, lives. Because of the war, the Americans in the small town regarded this Hashimoto as an enemy. Seeing all this, the priest deliberately added a single note for Little Boy's good deeds, "Be friends with Hashimoto". This introverted child began to challenge himself with beliefs, temporarily surpassing the psychological barrier, and persuading himself to become friends with this "enemy" in order to achieve a more ultimate goal
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