Ten years ago, they each made a promise: "I will definitely come back to pick you up, and then I will be able to fulfill your wish."
"Okay, I'll wait for you."
Ten years later, he forgot about him, and he also forgot about him.
One has lost his soul, and the other is waiting with his soul. "My first wish is, don't forget me; my second wish is, you must come back; my third wish is, please forget me."
No memory can truly be forgotten. Just like a canon, the beginning and end are entangled, and it is difficult to abandon it in life or death.
All time will grow old, but there is always a song that we cannot forget.