A boy at the age of 13 dies from Lung Cancer. Before his death he was obsessed with the concept of dragons, massive reptilian beasts with wings wider then 2 school busses and a lust for carnage. As he layed in his hospital bed slowly dying, he constantly read stories and books about dragons, fantasy worlds and knights in shining armor. Thus he died in his sleep, dreaming of being one of both mystical beasts flying through the sky. Little does he know what lies before him beyond the void of death.

Also on Royal Road: https://www.royalroad.com/fiction/44398/poisoned-wine-chronicles-half-dragon-a-litrpg