In middle age, Lin Chen is weighed down by life's burdens. His career is going nowhere, his family is plagued by constant conflict, and the grind of everyday life slowly wears away his drive. After an accident, he returns to his youth in high school. This time, he's determined to rewrite every regret: be there for his family, take his studies seriously, and hold on tight to the love he let slip away. He avoids the mistakes he made in his reckless youth and makes up for what he owes, living up to the love and care he's been given. As the old days unfold once more, the spirit of youth returns, and amid the intensity of those formative years, he becomes the person he once dreamed of being.
I just finished watching the short play and found the book. I wonder when it will be serialized.