In a classic fantasy world where heroes, saints, demon lords, magic beasts, skills, and magic exist, our protagonist, Doyle von Agnis (fifteen years old), was born with an impressive array of titles: the grandson of the Hero of the Flame Spear, the son of the Hero of the Thunder Spear, the son of the Saint, the heir to a ducal house, the childhood friend of the Crown Prince, and the fiancé of the Third Princess. He was also born with high-level abilities befitting his titles. However, this protagonist, who seemed to have won at life, was so doted upon by his parents that he ended up charging headfirst down the path of a stereotypical villainous noble's spoiled son!

Then, this protagonist, who was in a position often relegated to the role of a villainous rival in classic stories, after being tormented by a high fever for a week, recalled his memories of being cunning and calculating.

And so, he resolves to reclaim the titles he's on the verge of losing, and become a person who can walk an honest path for the sake of those who loved him even as a (spoiled son).

This is a reincarnation fantasy incorporating common tropes.

With the bar lowered to an extreme degree, our overpowered protagonist will reconcile with those he has alienated.

Also, the story will proceed with protagonist-centric convenience from beginning to end.

If you have the time, please consider checking it out.