Him and her.
They lived in the same alley, and the light from his bedroom could be seen from her kitchen. They have been classmates since kindergarten, then elementary school, then junior high school, and all the way to high school. Their parents were colleagues in a factory, and they would naturally say hello when they met. He would call her parents uncle and aunt, and she would do the same.
But no one would think that there was anything between them.
Conception: