Vengeful Angel：Looper's lover

A car accident caused Wu Qingluo to lie unconscious in the intensive care unit. His good friend Song Zhi, who traveled with him on the train, did not survive the test of fate and still left the human world. In front of the tombstone, an unfamiliar man was standing there mourning. He was speaking to the sleeping soul, as if he was having a good time after his revenge.
When the unconscious Wu Qingluo woke up, he had returned to the Nanze City of ten years ago. Because they needed to live together, Wu Qingluo changed her name to Rolo. Through an educational institution, she became a tutor. Then she met Lin Minjia when she was young, but by chance, Wu Qingluo discovered that this boy was her future boyfriend, so they got to know each other for a while. On the day of Lin Minjia's entrance exam, Wu Qingluo sent Lin Minjia to take her exams, and on the way, he saved Lin Minjia, causing her to die from a car accident. But in fact, Wu Qingluo had just woken up in the real world.
But in the parallel world, Wu Qingluo's death had a huge impact on Lin Minjia. However, this matter was kept in Lin Minjia's heart until she met Wu Qingluo, a girl of the same age in university. At that time, Wu Qingluo's best friend, Song Zhi, was chasing after Lin Minjia.
Wu Qingluo and Song Zhi were both outstanding girls. They were similarly outstanding, but they both liked Lin Minjia. This seemed to have become a competition. In the end, who did Lin Minjia choose?
Who was the man at the grave? Whether all of this was a conspiracy or a riddle, perhaps only those who were within it could understand.