Responses
From what I read it was bcos he saw how ning ye and su mu were like a happy family with a kid, and he realises that he too could have that family, if he din abandon the uke's dad. He wanted to spend the rest of his life amending to his uke's dad and treat him well. He regrets bcos he realise how much pain the uke's dad went through bcos of him, so he wants to do whatever he can with his remaining life. In fact, the uke's dad doesn't know that he has cancer, but su mu knows, and he told su mu not to tell his dad bcos he would worry
Maybe bcos i read the raws in chinese but i really teared up reading the remaining chapter :< the convo between the main uke’s (blonde) dad and his ex rlly got me crying. The ex got cancer but was refusing treatment and he said that as long as he sees the main uke’s dad find a good partner and is able to live his remaining life happily he doesnt care if he dies bcos he owes him too much :( alot continues to happen the story is still ongoing so idk if anyones gonna die but i hope not ╥﹏╥