Secretly kissing in the president’s office

Storyline: Tsubaki left her work three years ago to accompany her husband in his business ventures. She left her boss Ozawa, who had a big crush on her, weeping for her. However, the husband’s company fails, and she returns to ask for her old job back. Ozawa agrees to help and buy back his company and debts but has a couple of conditions. One, he will hire Tsubaki as secretary. And second, she will be his mistress.