[Locked] Looking for an old corruption series

Hi I'm looking for a manga consists of one-shot stories about MILFs. I remember the first story was about a MILF who signed up to be trained by a group of men. They made her eat and brush teeth with their semen, and she is not allowed to masturbate. After a week or so she came back for her orgy. Anyone has any idea what this manga's name might be?