AniDB is your friend: All 18+ Restricted Anime that Started Between 1980 and 1989 Sorted by Average Rating Descending
Pretty sure it's from one of the Discipline series, not sure which episode however.
http://www.animenewsnetwork.com/encyclopedia/anime.php?id=5242
http://www.animenewsnetwork.com/encyclopedia/anime.php?id=11455