(Credits to Air con on yt!)

Chuuya was experimented on when he was younger and was a vessel of Arahabaki, eventually humans found out about it and they made a cult in the mountains where they all worshipped Chuuya and the god in him, they met his every need no matter how useless or extreme, they dedicated their life to him

One day they were just worshipping him until a certain brunette entered their mountain.

Dazai: "What is going on."