Yoake wo Kogasu Boshiboshi

Overview

High school student Kaneto reunites with his childhood friend Kosuke, who he cut ties with, for the first time in a long time. While trying to save a cat that was about to fall into the river, he ends up falling into the river with Kosuke. When he wakes up, he finds himself in an unfamiliar place. He tries to find his way home, but Kosuke seems to be acting strangely... Furthermore, they are attacked by a group dressed in unfamiliar clothing and Kosuke is taken away, and the two are separated... A Chinese fantasy where you search for your childhood friend and uncover secrets from the past in a mysterious place that somehow feels nostalgic, despite being another world! (Source: Ichijinsha, translated)

Source: AniList