Captive married woman investigator

Yumi, who was working as a female investigator, ended up getting married because she guarded her husband, a business owner. Just when she thought her peaceful days with her kind husband would continue forever, he suddenly disappeared. On the advice of her boss, Yumi learns of the connection between her husband and a company president named Himura, and uses a false name to infiltrate the Himura family as a secretary. Yumi steals Himura's eye and searches for clues about her husband. However, Himura, who has a skeptical nature, finds out about her and it seems that her connection with her husband has disappeared...