My Enemy Thanked Me Three Times

My enemy thanked me three times in total. For the first time, he raised his glass and called me brother. The second time, he was in a wheelchair and said that I was the only friend who still treated him as a normal person. The third time... Those words made me never sleep a full night for the rest of my life. I approached him for revenge. But when the truth came to light little by little, I couldn't tell who destroyed whom and who saved whom. Some died many years ago. The destiny of some people really begins from that day.