My Fire-Breathing Dragon Should Strengthen Itself

Normal version: A story about a soul from another world, a gentle young man who gradually left his own legend in the elf world step by step. His partner Charmander also accompanied him step by step to become the strongest direct version You deserve to have the golden finger at the beginning. A perverted little fire dragon uses the golden finger step by step to become stronger, stronger, and stronger, and finally breaks through to the top of the world. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.