It's a simple piece of writing, written by the author himself, just for the fun of it
——————————————
The first 20 years of Lin happy's life were extremely dull, until he saw a small advertisement on the road when he was 20 years old...
Lin happy was walking on the road one day and saw a small advertisement posted on a telephone pole. Lin happy couldn't remember what it said, but he remembered that the advertisement had a very magical husky emoticon printed on it. As he walked by, he couldn't help but take a photo and laugh out loud...
Then... He passed out without any warning, no electric shock, no car accident, no suicide, no abortion. (Huh? It seemed like something was messed up.) He just walked straight away. Suddenly a white light flashed, and he became blind. He also had a system that was useless and did not issue tasks. The existence of the system was probably to tell him why he traveled through time and occasionally prompt the plot...
If Lin happy is given another chance, he will definitely not squint his eyes and not even glance at that damn advertisement...
————————————————
The protagonist is visible after traveling through time, but others think the protagonist is invisible?
Just quit if you get frustrated. After all, the author just writes for his own pleasure?_>`