Story with RPG like system

I am not sure if this is the right place, if it isn’t, please tell me.

I am not asking for someone to write a story, I am asking if the community knows of a story about young adults (18+, preferably male as MC) with a RPG system like setting. I mean, the MC can “upgrade” his body anatomy, intelligence, charm, etc.

Similar stories where the same body upgrade can be done through plain magic is acceptable too.

Source: reddit.com/r/eroticliterature/comments/9s8eui/story_with_rpg_like_system