What does the fight between the protagonist and the villain have to do with me, a passerby?

Introduction: The protagonist should pretend to be cool, pretend to be a pig and eat the tiger?Villains should be domineering and unscrupulous?Should passers-by be ordinary and passively beaten?Jiang Yunyi traveled through time and was reborn as an ordinary passerby, but used extraordinary strength to lead an extraordinary life, sitting back and watching the direct battle between the protagonist and the villain. "Well, this melon is so sweet." Jiang Yunyi, who was holding his wife and child on the hot bed, said with deep feeling. (ps: This book is more of a daily text.)