Im looking for novel like Womanizing Mage. Good romance/harem with detailed mature/smut scene. Im currently reading Nobunaga's Imouto is My Wife but it didnt have a lot of chapter. So novel like this is what Im looking for.
Great Demon King somewhat less frequent smut, and less waifus but quite similar. Dragon Blood Warrior Bit more smut and not quite as romantic but still similar. Asuka of the Scarlet Sky More smut and less real story but romance is good. My Wife is a Beautiful CEO Less smut, very good story and character building.
Have you read Fourth Prince's Debauchery? It's an original novel, but probably what you are searching for.