With terminal lung cancer, he had only three months left to live, and his farewell letter was only half finished.
The [Regret-Redemption System] forcibly bound itself to him, authorizing him to return to the past and make amends for the seven great regrets of his life.
But the System's rules were cold and merciless:
1. The ending cannot be changed: he will die of lung cancer.
2. Every trip back accelerates his death in the real world!
Back before his brother fell from a building, back on the night he fell out with his father, back in the rain when his first love broke up with him... He fought to change what happened, hoping only to have a clear conscience.
