Another Lady Innocent (2005) +18

Original title: フロントイノセント ～もうひとつのレディイノセント～

Fey, the beautiful and innocent daughter of a wealthy land owner, made friends with her maid Sophia and her friend John. But when she was sent to a school she left John in the care of Sophia, now she's finally back, and it seems to be the end of her innocent days.