Based on the adult manga by Sawaru Erect. The third series from the Pandra franchise.

There once was a demon Astaroth who invaded the human kingdom, plunging the world into war. However, he was finally suppressed by a group of heroes who took his powers and sealed him deep underground. Two hundred years later, there were rumors that the seal was broken due to the recent shifts in the Earth’s crust and that the demon had been revived. Many confident adventurers descended on Astaroth’s underground labyrinth with the intention of defeating him and becoming famous. Little did they know that he had set out a trap for them…

Based on the adult manga by Kishizuka Kenji.

If you manage to stay a virgin till you are 30 years old you will become the next family head. However, the candidate for the next family head Teshirogi Naoki was being tempted by the women surrounding him. Will he be able to go through many trials and become the head of the family…?!

Based on the adult manga by Omina Tachibana. When an accident brought their plane down, Shindou got stranded on an island with a few the students and the teacher he is in love with. With him being the only male on the island and all the females getting honey, a harem is in store for our hero.

The final ritual night commences and Reika Kitami gets ready to use Aki Ichikawa to resurrect the Bible Black. But the powerful Jody Crowley interrupts the ritual, overpowering Kitami after taking control of her closest ally Kaori Saeki. Jody attempts to impregnate Aki to give birth to a powerful being, fulfilling her father’s prophecy. Hiroko Takashiro and Toru Yuge meanwhile try to stop her at all cost.

Based on the erotic game by Lilith. Annerose is captured by Ashwarya, while Riku and Miku look for her and Miku’s brother in the abandoned city of Amidahara.

The powers of darkness are about to reach a climax as police investigator Naoto Yamanishi is enchanted by Imari/Kitami and possessed by Jody Crowley. Hiroko Takashiro fights Crowley and discusses the girl’s plan with Tokken-chief Toru Yuge. Imari discovers Yuki Toudou’s deceit and brutally tortures her and the previously captured teacher Rika Shiraki. Meanwhile, Tokken-agent Aki Ichikawa is back on her feet, but not out of danger yet.

Substitute Academy teacher Rika Shiraki is brutally tortured by Kaori Saeki’s followers. Police investigator Naoto Yamanishi saves Aki Ichikawa from the crazed Academy vice-principal Takeshi Oshima in the hospital before quitting his job and joining the paranormal investigation agency Tokken.

With the help of Rika Shiraki, nun Hiroko Takashiro manages to protect Aki Ichikawa after battling Jody Crowley, Academy vice-principal Takeshi Oshima’s corrupted mind causes him to assault a hospital nurse, substitute teacher Shiraki is abducted by Kaori Saeki’s followers, and Takashiro confronts the evil Reika Kitami, who is still in control of Kurumi Imari’s body.

With Reika Kitami’s soul awakened inside Kurumi Imari’s body, the witch once again attempts to seize power by stealing the Spear of Longinus. The mysterious Jody Crowley meanwhile revives the presumed dead student Yuki Toudou to influence future events. And the Tokken agency continues its investigation into the occult incidents with the help of agents Imari and Aki Ichikawa.

Academy teacher and occultist Kaori Saeki unsuccessfully attempts to revive the Bible Black with a new group of followers, but is interrupted by a mysterious white robed girl. Police investigator Naoto Yamanishi witnesses a vision of an old love at a crime scene. And Tokken’s chief psychic investigator Kurumi Imari again loses her body to the soul of Reika Kitami.

On Walpurgis Night, the evil school nurse Reika Kitami takes the final step in her plan to exchange bodies with student Kurumi Imari. Meanwhile, Taki Minase and his art teacher Hiroko Takashiro desperately try to stop her. The fate of all their friends is at stake.

Rika Shiraki takes revenge on Taki Minase for neglecting her. When the night of Walpurgis begins, Minase desperately tries to save his childhood friend Kurumi Imari from the clutches of the witch Reika Kitami with the help of his teacher Hiroko Takashiro.

Based on the game by Guilty. Miu and her family of four women are well-known in the media for being aspiring young celebrities. Her mother, Sayoko, is a famous fashion designer and has scored a job for the family to shoot a TV production; a rare opportunity for the family to be together and enjoy themselves. The girls travel to a small, isolated village in late August and the filming begins. Little do Miu and her family know however, the entire production is a scheme. This is the time for a local festival and they happened to unwillingly volunteer to be a key figure for this festival. One by one, the girls are subjected to the traditions of the festival, experiencing first-hand just how serious it is.

Taki Minase breaks free of nurse Reika Kitami’s influence when she kidnaps and abuses his childhood friend Kurumi Imari. Meanwhile, art professor Hiroko Takashiro finds out Kitami’s ultimate purpose and teams up with Minase to stop her.

Based on a game by Syrup. On the recommendation of her father’s friend, Takagi Atsuko takes up a teaching position at Nansui Academy. One day, pictures taken by a peeping tom are put up on the notice board. The identity of the culprit is unknown, but suspicion falls on the class outcast, Murayama Kenji. Atsuko defends Kenji, whose father is the Academy’s principal, publicly. However, the truth is that Kenji is using that authority to force Atsuko into many sexual and perverse acts. Some of these in public. Soon, Atsuko finds her body craving for even more… Later, Takagi Yui, Atsuko’s younger sister and a student at Nansui Academy, discovers what is happening. In order to help her sister, Yui approaches the Murayamas…

As Walpurgis Night approaches, nurse Reika Kitami reveals her history and true nature when torturing and raping professor Hiroko Takashiro. With Taki Minase and Kaori Saeki firmly under her control, she arranges the rape of Minase’s girlfriend Rika Shiraki and kidnap of his childhood friend Kurumi Imari.

Kurumi Imari is distressed after she catches her friend Taki Minase having sex with a bewitched Rika Shiraki. Minase is tempted by evil, school nurse Reika Kitami reveals her true nature and Kaori Saeki meets up with her magic club.

It’s time for the local summer festival and Kentarou is accompanying Shizue, who has come to visit after being away for a few years. During the festival Kentarou leaves Shizue alone for a bit, and when he finds her again he sees a shocking scene… Later, Shizue goes to a local photo studio to pick up some photos from the summer festival, and decides to do a bit of modeling while there. Before long Kentarou also joins… (Source: AniDB)