I'll be in Charge of Your Body

Story :  Sae Akino, who works at an apparel company, Lila, has an younger assistant Kamiyama. Kamiyama works hard even though Sae is rough on him. He is someone Sae can count on, but he also tells her: "You're my type, Ms. Akino." One day, Sae gets fired suddenly unreasonably. Kamiyama tells Sae, who is very depressed, "if you'd be my maid, I can get your job back at Lila." He calls Sae by her first name and gets her into bed as if his personality has changed all of a sudden. Why does Kamiyama obsess over Sae so much? He also seems to have known her for a long time...