Panchira Teacher (Panty Flash Teacher) is an OVA series by AT-2. I just recently watched another hentai made by the same studio which was awful, so I was very pleasantly surprised to find out that Panty Flash Teacher is actually really good. In fact, I'd say it's probably better than at least 90% of the other hentai I've seen.
Like other works by Studio AT-2, Panty Flash Teacher actually features a story. But unlike their other works, the story in Panty Flash Teacher actually matters. Our protagonist, the titular "Panty Flash Teacher", is a young woman named Machiko. She is the daughter of an aspiring politician, and has just recently gotten a job as a teacher. Machiko is an all around lovely character with a sweet (albeit naïve) personality and a strong sense of duty. However, this ends up putting her at odds with her students, who are some of the most sadistic punks in the world, alongside her fellow teachers, who are too lazy to do anything. Since Machiko is on her own, she naturally has a tough time, and I actually felt sorry for her. Her students also each have there own personalities, ranging from conflicted accomplishes to school shooters in the making. The only one of particular note is Homaru Utsui, who is the soft-spoken leader of the bullies at the school, and also the son of a political rival of Machiko's father. Naturally, all this culminates in a tale of deception, blackmail, and sex. And unlike a lot of other hentai, the story is engaging and easy to follow.
The art is really good, especially on Machiko. The other characters aren't drawn as well, but they still look passible. The close-up shots in particular are well drawn, and you can tell the artists put a lot of effort in. The animation, while somewhat limited, is still very good, especially for the time this was made. The sex scenes are also well made, and not overused in the slightest.
The sound design is also pretty good. Machiko's voice actress makes her sound appropriately sweet, while Homaru sounds clever and conniving. Sound effects are not overused like they are in other hentai, making things seem more realistic. The music is also good, and helps add atmosphere to the scenes.
Overall, Panty Flash Teacher is a stellar hentai, and something of a hidden gem in my opinion. 8/10
Would I recommend you watch Panty Flash Teacher? Hell yes!