I've been wanting for many years to see a copy of Reborn’s Day ~月夜の出来事~, but I don't expect to find it. As far as I can tell, I don't think a downloadable version of the game has ever been made or released.
The following games more or less fit your description...
モリガンの憂鬱(Morigan no Yutsu) - evil woman=モリガン(Morigan)
真・NOZOKI魔2(Shin Nozoki Ma 2) - evil woman=美凪ありさ(Minagi Arisa)
痴女の館(Chijo No Yakata) - evil woman=鞠香(Maika)
やみツキ(Yamitsuki) - evil woman=箕村つかさ(Minomura Tsukasa)
受胎島(Jutaijima) - evil...