I, Shinnosuke, Want to Change the Line of Fate!

I am Nohara Shinnosuke, I am five years old this year, and there is a strange uncle in my mind who claims to be a fused time traveler and says he is me seventy years from now. He also said that he used the power of the system to travel back to the time when I was five years old, and wanted to help me change the ordinary fate of my whole family, and turn the funny daily drama into a refreshing and rich drama. The price requires me to stimulate other people's emotions to gain destiny points. But how can I, a well-behaved child like Nohara Shinnosuke, possibly stimulate other people's emotions? I really... Can't understand it.