"Against The Sky Supreme" (逆天至尊 Ni Tian Zhizun) is a Chinese anime based on a novel by Ku Ya Yu Mu (枯崖雨墓). The anime is an **ONA (Original Net Animation)** and has been airing since July 16, 2021. The story is set in a vast universe divided into the **inner universe** and the **outer universe**, which are in conflict with each other. The outer universe is ruled by demons, while the inner universe consists of the **Realm of gods**, the **Eternal Realm**, and the **Mortal Realm**. The narrative centers around the **Tianfa Continent** and other mortal worlds collectively known as the **Jiutian Xin Region**. Here, nine immortal emperors command all star fields across nine layers, and above them is the realm of purification of immortal gods. The protagonist, **Tan Yun**, is a god-like figure known as a sky supreme, who played a crucial role in protecting the inner universe from demons alongside his comrades. The series explores themes of destiny, power, and the quest for transcendence amid the cosmic struggle between gods and demons.