"Jingle bells" plays while two girls in crude CGI and Christmassy outfits move so stiffly that you wonder if they're meant to be Christmas tree ornaments.

Twenty seconds later, they're dancing to something more modern. (I preferred "Jingle Bells".) There's no onscreen sex, just nudity.

It's an unusually realistic anime portrayal of the idol industry.

Mia and Yua are idols. Mia starts worrying about Yua, who's been a bit depressed lately. This might have something to do with her balding, overweight, sinister manager forcing her to have sex with him.

Mia tries to rescue Yua, but that manager has a smartphone app that makes invisible naked men assault her sexually in public places. Eventually she has to have sex with him too.

Unusually realistic? Well, I meant in anime. It's more plausible than Aikatsu, for a start.

It's upper-end hentai, with enough plot and characterisation that it could easily have been a normal TV show. You could edit out the sex scenes and have something short, but watchable. About of a third of the running time is a reasonably good episode about a school volleyball club.

Takahashi is a good-natured, long-suffering boy who'll be mildly horrified whenever girls try to have sex with him. Unfortunately his classmates include girls who invite him to their club room, drop a bra on his head and then blackmail him into becoming their club manager. If he doesn't, they'll tell the teachers that he's an underwear thief.

They then have sex with him. His best friend films this and then leaves the footage around for her friends to find.

It's decent. (And of course wildly indecent.) There's quite a big cast and there's nothing wrong with the characterisation. Takahashi has his heart in the right place. Nothing wrong with it.

(I cheated slightly by watching ep.1, even though the series ran from October 2017 to June 2018.)

No animation, just still frames and the two voice actresses playing your little sisters. One's smiley and friendly, while the other's a bit tsundere, but you're all good friends and you'll eventually be enjoying happy threesomes. No one's pregnant at the end, but it's not for want of trying.

No animation, just still frames and a voice track.

Tsubasa has a penis, about which she's puzzled and worried. Her older sister, Toa, helps reassure her by sucking it. Toa also explains about the mysterious white stuff that comes out afterwards.

They continue with activities like this. No men, just the two of them. Toa turns weird and rapey at one point, but they get over it. (Tsubasa tells Toa to stop talking like that because it doesn't suit her.)

"Imouto" means "little sister".

"Hey, big brother! Dad and Mum said that they'll be away for a month, starting today!"

Our hero has five happy, worryingly open-minded little sisters, although the good-ish news is that they're (very) physically well developed. This doesn't appear to be a paedophile incest anime. Our hero walks in on Rika in the toilet, then Hiharu and Zakuro talk filth before Hiharu and Sakura have sex with him. (No, not together. The threesome's in ep.2.)

Dialogue Quotes For Immortality:

"Big brother, just call me any time you feel like having sex. It's my job to make you come!"

"Then how about assigning each of us a day of the week?"

"Sounds great! I'll be on Mondays!"

No one's taking any precautions to avoid pregnancy. However each girl gets some characterisation, while it's quite well animated and the art's better than a lot of hentai. The breasts look like breasts.

No animation, just still frames and two voice actresses.

An elf warrior in a fantasy world gets raped by the man she'd come to kill... and then by goblins, two different kinds of tentacles and an entire gang of adventurers.

At first, she keeps promising to kill her rapists. Ultimately, she tricks another elf into being gang-raped alongside her and they both enjoy it. Yeah, it's one of those.

The CGI models are excellent. Food looks delicious, Saki herself looks superb and the insects are impressively, disturbingly grotesque.

The animation, on the other hand, is like a low-end 1990s video game. Nothing moves properly. Look at Saki's topless exercise routine before dinner, for instance. The producers also couldn't be bothered paying for a second voice actor, so the innkeeper's dialogue appears as onscreen text.

Anyway, Saki is an insect hunter with a sword and a bikini. This would be absurd in our world, but makes sense with the bugs she's hunting in this fantasy one. She'll get drugged and raped by an innkeeper and assorted bugs, after which she'll give birth to giant larvae that crawl into her arse and hypnotise her.

The film ends with what looks like a living, invertebrate fleshlight.