The main use was in the human world and a couple of seconds before he was killed (I think by a vehicle) a supernatural snake in another world brought him to his world. Now the snake is a almost a God but needs to spends his whole body with his fated partner in order to become a God aka a dragon. The person he saved was his fated partner but he ended sending him back to the human world.
i just read it a few weeks ago so i knew immediately what you were talking about here it is https://www.mangago.me/read-manga/summoning_a_bl_fan_to_another_world/ 1 reply
