Everyone is a fool in front of love.
Lao Itch is willing to be stupid for love, even if he is just a substitute, but he still protects him and the person he regards as more precious than his own life, even if he only regards him as a childhood playmate in his heart.
Wu Xie kept thinking in his heart that he wanted to forget his little brother. He tried desperately to forget and escape from that episode, but he was still struggling with it. Can he forget it? But the more we forget, the more firmly we forget, and the more we forget.
That person, the person who protected Wu Xie with his faint eyes and actual actions, is no longer there... That person made a promise not to let go, but he broke the promise.
In this love, who hurt whom, or both are scarred.