Ojousama no Shimobe is a manga by Taguchi Hoshino, it is serialized in Magazine pocket . The series is currently 1 volume long with the second volume set to release on October 9, 2018. Here is the synopsis from Anime News Network : "The story centers around a main character with a meddlesome personality whose father is a butler and whose mother is a maid, and who one day meets a rich young lady who cannot even change her own clothes, let alone know what do in the outside world." The translation for this manga is only up to chapter 6 at the time of writing this, so there hasn't really been any indication that a harem ending is possible yet. Hell, there are still only two harem members so far, but with a couple of girls who could potentially join the harem. The reason I think this is a series people should keep an eye on is because of Taguchi Hoshino's previous manga, Maga-Tsuki , had a harem ending. Most of the girls in Maga-Tsuki were gods, so a harem ending
Harem Endings are Happy Endings