When all the dust settled, someone asked him: When you treated her like that, she was extremely disappointed in you, had no memory of the world, and even sacrificed her life to save the world. Do you... Regret what happened today? The person's final answer was just a long silence.
Regret? How could he not regret it, but he couldn't regret it! Because only he knows that that is the only way to survive. He doesn't want to lose her, he doesn't want to have her in this world anymore, so even if it hurts his heart, even if she hates him extremely, even if both of them are scarred, he will choose that path without hesitation. He is selfish after all!
But the only thing he didn't expect was that she would choose to abandon her completely...
Intention: Better to lack than to overdo