A Man of Great Infatuation summary:
The third generation billionaire's secret heir, Dong-Ju X Secret secretary Min-Young.
Lee Min-Young of the HR team happened to see Han Dong-Ju, a new employee of the sales team, coming out of the president's office.
Surprisingly, Min-Young finds out that Dong-Ju is the president's hidden son.
Moreover, he receives a secret offer to spy on his private life in order to make him his heir...
"But this new employee, seems like he is flirting with me?!"