This city is too big and the people are too small. He lives below everyone and is labeled as "minus level three", which is bleak. Until another person who is also struggling at the bottom appears, without light, they become each other's sun. Go up level by level, get closer to the opponent level by level.
Intention: Two people at the bottom of the valley, redeem each other in the city, go from being negative to the third level, and live to be each other's first level.