The inspiration came from an Internet joke: a young woman accidentally slipped and fell into the garbage pile while taking out the garbage. The old man picked up the tatters and hugged the young woman who was about to get up and said: "People in the city are really spendthrift. A good wife will not let her go..."
So the protagonist of the story is an abnormal professional, both of them, and Shou was indeed picked up from the garbage dump... Well, that's probably the story.
I'm not good at writing about emotions, so most of the time it's probably just narrative, and the logic may not be strong, so please forgive me for only writing what I want to write...
Intention: