Finding BL manhwa title

The main character has short black hair and a tattoo on his stomach, he was reincarnated into another world where he is revered as a god. Unfortunately, the land he was reincarnated in is huge into purity culture while he just wants to have sex. One of his most loyal followers (white long hair) is a weirdo fuck and the king (red long hair) who rules the land initially finds him distrustful (due to him being non religious) but fancies him after a while. The setting is a very cold place, one where they struggle to keep warm all except the temple. In the story there’s a flower that grows that can keep them warm. The main character ends up giving them a clean source of water by using modern knowledge.