Sister Club to:
16-30m Standalone Anime
31-60m Standalone Anime
This isn't as much a passion of mine as it is convenience for my other 2 clubs. I don't want to blatantly ignore hentai altogether on those clubs, so I'll leave them here. As such, this list probably won't be updated by me. I'm not entirely enthusiastic about keeping this list accurate, so it shall remain accurate to December 2016, unless someone comes along and posts entry suggestions
If you actually want to use this club, its most useful as a resource for one-episode, standalone hentai anime. All the Anime Relations can be watched Standalone. If they have a prequel, its also on this list. (assuming it's also standalone; see restrictions) They're all 1 episode in length.
Restrictions for entries:
Rule 1: All entries must be between 16 and 60 minutes (according to the information on MAL, not its actual duration)
Rule 1a): Anthologies disguised as movies are allowed, as long as the average length of each work follows Rule 1 (Though I don't know if any of those even exist).
Rule 2: Entries should be standalone, i.e. it can't have any prequels (or sequels/side stories you must watch to understand the entry) that don't follow Rule 1.
To clarify, the total duration of the anime has to be between 16 and 60 minutes. There cannot be multiple episodes to a entry. The only situation where there would be multiple episodes would be if it was an anthology.
The restrictions are somewhat strange, but this club is more just so I don't have to list hentai on the other clubs, since they'd be too saturated, and that would hurt the purpose of those clubs.