Tadaima, Honey ~Kanojo to Boku no, Himitsu no 2%~

Nanako is an office worker who has suddenly become a sex friend of Ayato, a popular celebrity. She was supposed to be one of the convenient women for Ayato, but he fell in love with Nanako, who has a mysterious atmosphere. What is the "secret" that Nanako confides to Ayato, who gradually becomes infatuated with her?