On a certain day, the protagonist picks up a bronze mirror and can travel to the past and future; and, with the help of memory, he can fulfill his previous regrets. This mirror is the tassel in the protagonist's life. In every time and space, the unsatisfactory ending of the previous life is rendered again with thick ink, and finally half of that ending is completed.
Concept: time travel, perfection, perfection, misplaced time and space