A Man Of Great InfatuationRare Mate ; Unlikely Affair ; 稀世情夫 ; 稀世男小三 ; 稀有伴侣 ; 绝世情人 ; 희대의 내연남 ; 희대의내연남

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?!"