In the *Reikan Jikenbo* series: 1. Shinigami no Kiss (死神のキス; 2003) 2. Yuureiyashiki (幽霊屋敷; 2004) 3. Hitomi de Kosetara (瞳で殺せたら; 2004) 4. Kimon no Ie (鬼門の家; 2004)

[Taken from FictionDB:] The boss had amnesia... and thought Jocelyn was his wife! Little did the domineering CEO know that the woman watching him with a love-softened gaze was none other than his secretary, Jocelyn Stemic. Though Lucas Forester had regained bits of his memory, he couldn't remember one wifely thing about her -- not their wedding day or passionate nights together. But one thing was certain: he wanted to be her husband in every sanctioned way. Jocelyn had no choice but to keep up the amorous charade. After all, loving Lucas was easy -- and being his "bride" was her deepest fantasy fulfilled. The hard part would be returning to her lonely life once her beloved boss discovered she wasn't the woman he thought she was....