Inventing Things in Ancient Times

A top-tier star and expert in every field transmigrates into the body of a wastrel. Everyone sees him as a villain and hates him to the core, yet he keeps working miracles and saves a nation in the depths of suffering.

The empress and princess both hate and love him, wealthy young ladies are devoted to him, and a chivalrous heroine breaks her sword for him, leaving behind a legendary tale of his romantic and domineering ways...