Sacred Haven of Debauchery

I now want a harem-style game, either based on the classic SV or at least on SHV.

Actually, in Granblue, you can obtain some characters from SHV (Albert, Lucifer, Azazel, Lucius) and wait for Valentine's Day/White Day events. There's a good selection of female characters. However, it's more difficult for male characters, as there's a lot of cute and shy trash.