The title of this TSF (see possession) series is a multi-layered pun involving the name of the company director possessing his subordinate (Okaruto Yuutai, age 56; sounds like "occult ethereal body", hence his comment after succeeding in possessing her) and the French loan phrase "à la carte", meaning "according to the menu".
This is an ongoing series. http://www.pixiv.net/search.php?s_mode=s_tag_full&word=%E3%82%A2%E3%83%A9%E3%83%BB%E3%82%AA%E3%83%BB%E3%82%AB%E3%83%AB%E3%83%88%EF%BD%9EOL%E3%81%AA%E3%83%AF%E3%82%B7%EF%BD%9E