It's a porn version of Neon Genesis Evangelion. That doesn't make it interesting, mind you, since the plot's minimal and the action's tediously repetitive. Rei Ayanami runs down a corridor for a minute, then after that it's all naughty tentacles. (Mind you, those tentacles come from a glowing bisected man who's been nailed to a cross, which is very Evangelion.)

That's definitely Rei, though. She's wearing her trademark jumpsuit. The other two girls are Mari Makinami (from the Rebuild of Evangelion film remake series) and Asuka Langley Soryu.

This series is based on a visual novel. It got four episodes in 2017, four more in 2019 and then another eight in 2020-21. Goodness knows why. It's disgusting and horrible. Its fat, creepy anti-hero suspects his stepmother and stepsisters of being evil or something, so he calls them all his enemies, spies on them with hidden cameras and rapes one of them.

The five girls of the school lacrosse club have tied up and gagged their teacher. Later that evening...

"It was worse than usual today. They played with my dick. In the end, I lost my house key. Who knows what they'll do if they see me looking for it in here?"

Yes, one of them catches him. It's based on a doujin manga that's apparently popular.

Translated into English, the title means "the innocent, voluptuous blonde exchange student's sexy training in Japanese culture". Her name's Natasha and she has a mildly annoying accent. (Despite having an English-speaker's rhythms, she says the English word "penis" in the incorrect Japanese way.)

She's the childhood friend of the silent protagonist and she can be easily talked into anything she's read about in manga.