[DeepL Translation - needs review] Introduction to Volume 1: "You should write down your wishes in this diary. Kohei writes his wishes in a diary given to him by his late grandmother. He wants to see his grandmother again, to ride the Nozomi train again, and for his father and mother to make up. ...... When he wrote in the diary, his wishes mysteriously came true. Kohei, who earned the nickname "Oboranger" after drowning in swimming class in the third grade, hopes to learn to swim this year....
