True story of Nobita and kivi

Nobita , the 9 years old boy from japan, seemed healthy and happy like any other boy. but he was suffering from schizophrenia. It is a disorder in which a person has less ability to think, feel, and behave clearly. Moreover, his mental controlling power diminishes. Nobita was also abused and bullied in his school by his classmates because he suffered from this mental condition. this disease makes one seeing things that do not exist 

His friends left him fearing that one-day Nobita can provide harm to them and he became lonely. Due to the disease and loneliness, he felt mediocre, abandoned, and stressed out. 

His medical condition forced him to imagine the Kivi , who is a dog robot, who has come to help him with every problem. 

Later, Kivi became his best friend, the only friend who would understand him. such was nobita dependent on Kivi whom he imagined would give him all sorts of weird gadgets to do stuff with.

At 16, he started medical counseling for the treatment of his disease. The doctor then told him that Kivi does not exist. It is just a mere imagination of his unconscious mind over which he needs to put control. This left Nobita in complete shock that he was lonely again. He suffered mental trauma.

Finally, nobita can't bear the truth and he shot himself with his father's gun & committed suicide at age of 16.