Yarimoku Majo ~Sex Mokuteki de Sodateta Otoko ni "Wakarase" Rareta Kiroku~

Her bed's been empty for hundreds of years... but a man's about to turn her into a total slut! The witch Rose's interested in how humans get down to business, and one day, she meets a human boy wandering in the forest. She takes him in, concealing her ulterior motives, and ten years pass... Now, however, she just feels motherly love for him! Her libido's completely disappeared... or so she thought! The grown-up Gill doesn't see her as a mother at all! He has his way with her, and Rose starts to understand the pleasures of being a woman... "No, I'm supposed to be his mother!"