Ishi wo Nagenasai

Welcome to the lowest level, known as the "Fourth Layer." It's a place where faith is disregarded and residents are looked down upon by those in the upper echelons. A man eking out a living on the streets is approached by a runaway girl from the upper levels, asking for guidance through the depths of this society. Their unlikely encounter with someone from the upper class ignites a subtle sense of empathy. What decision does the man make in his quest to ascend?

(Source: Kodansha, translated)