The true story of crayon Shinchan (the story behind crayon Shinchan)

Regarding whether Xiao Xin died at the age of five, there is the following statement:

One theory is that Shinnosuke's sister Kwai had a traffic accident and Shinnosuke died to save her. In memory of him, his mother Meiya painted Xiao Xin with his relic-crayons. In other words, the crayon Shinchan we see now is actually a fantasy of Mishima Nohara, and the real Shinchan is dead. Of course, this is not an official setting, but an online rumor. However, this does not affect netizens to express their feelings, such as "I never thought it was such a sad story". Crayon Xiao Xin died in a traffic accident at the age of five. Run to protect the sunflower. His early death made Meibin Nohara mentally abnormal. She wrote in her notes: "How happy she would be if she were still alive ..." The content recorded in crayons, Nohara's legacy, is Crayon Shinshin. ......

About Xiao Xin's age