Trapped on April 9

When Tang Nan woke up, she discovered that time had stopped on April 9. Apparently, she was the only one who noticed. She revisited what had happened that day, and the two friends in her memories turned out to be the key to the mystery. Every time she was about to investigate further, someone would stop her. When she discovered that her friend's basement was covered with photos of her own burial, Tang Nan, who had only wanted to find out why time had stopped, realized that things were far beyond her understanding. As she woke up again and again, she gradually regained her sense of self. At the same time, someone who looked exactly like her appeared...