Here are some polished versions of your copywriting that enhance emotional depth and characterization, making the story more appealing and resonant: --- For the past two years, brain surgeon Minakata Jin has lived in pain and self-blame.The operation he personally performed was originally intended to save his fiancée's life, but it eventually made her fall into a coma.Whenever the night is late, his heart is swallowed by endless regret and powerlessness. Fate changed quietly after he fainted in the hospital once.When he opened his eyes again, he found himself traveling to the Edo era - a world full of unknowns and dangers without modern medicine.As soon as he came back from his shock, he was attacked by a samurai. When his life was hanging on the line, a man named Kyotaro stepped forward and saved him. In order to repay his kindness, Nan Fang Ren did his best to perform a nearly miraculous first aid surgery on the seriously injured and comatose Kyotaro, despite the lack of any modern medical equipment around him.He used his hands and wisdom to regain the other's life from the God of Death.This move not only changed Kyotaro's fate, but also deeply touched his sister Saki.She began to develop a strong interest in this doctor from another world and decided to become his assistant and accompany him in unfamiliar times. But Nan Fangren never gave up his belief in returning to the modern era.He knew that only by finding a way to go back could he continue to face the beloved figure waiting for his awakening.In this journey across time and space, he not only wants to save his life, but also save his broken soul. --- This version strengthens the emotional level of the characters, especially the protagonist's inner struggle and responsibility, while also enhancing the sense of substitution and appeal of the overall story.If you need to further adjust your style or tone, feel free to let me know.