Join Atros on a journey through the Underworld and many more fantasy environments such as the Human Realm... and Heaven!? A quest that spans millenia. On his hunt for power to protect himself and his newfound friends, and maybe, just maybe a way to get back to Earth. Atros lived a happy life, in his prime and just starting to kick off. Until he began receiving strange dreams, hallucinations, ane feeling eerily tired worse and worse every day. Finally, while dead sick in his bed; it happened! Like in the novels! He Isekai'ed in another world. Except he didn't want that! Not only was he enjoying life on Earth, this new world is so brutal! Thank god I at least don't have a sense of taste, the food here is awful he thought, Rise of Atros also has a relatively heavy focus on lifespan, and watching loved ones come and go through various means due to his psuedo-immortality. With hints of discussion on morality latee on. By no means is it trying to be philisophical, just includes undertones and scenes about it.