Nanako often gets work pushed on her due to her serious work ethic and gentle disposition... But only the company's very best, Takuma Kamiki, ever recognizes her hard work. The smile of this angelic being is her only solace at work, and she looks up to him. However, one day, as she's doing overtime, she sees him in the middle of an unbelievable situation!! Not only that, he also declares that he has no interest in romantic relationships, only in physical ones... Is this how he really is!? Resolved to believe in his angelic side, Nanako and Takuma make a bet... But he comes after her, trying to bring her into a world of delights!