Based on an adult manga by Taropun.

After family was taken care of, he decided to set his targets on her classmates…

The depths of our planet hide a subterranean, magical world named Roa currently in the grip of a terrible war between the all-female knight corps of Queen Gloria and the monstrous troops of the evil syndicate Zerou.
The story starts when Metzer, a young and brilliant Zerou officer, gets official approval from Zerou’s high command to try a new plan suggested by the protagonist himself. Secretly relocated to the surface of Earth, his mission consists of gaining the trust of the Sweet Knights, the two japanese girls bestowed by Queen Gloria with the power to protect the surface world from the monsters of the syndicate. After discovering their weak points, Metzer will use his monsters to defeat, kidnap and brainwash the Sweet Knights into sex slaves devoted to Zerou’s cause.
However the syndicate do not know (yet) of Metzer’s great ambitions…

Moena was a normal college girl until she discovered that she had special powers hidden within her body by her father. When Dark Mother and her army of sexy demon women threaten the virgins of the world, Moena transforms into the naked masked heroine Angel Blade. Moena”s stepmother, the weightly endowed Kyoka, is kidnapped by Dark Mother. With the help of a team of barely dressed heroines, Angel Blade storms the demon”s stronghold. With the help of the dark-skinned succubus Nail, a former villian, they reach the heart of evil and face off with Dark Mother herself!

Airi’s incest life continues on but a new man enters the scene…

Touka Mizumori, a beautiful female college student who started her activities as a magical female college student Christia. However, she knew that in order to use magic, she needed emotions such as shame and pleasure in order to accumulate magical power… As a result, Touka was attacked by enemy monsters every time! Sometimes she spends all day having sex, sometimes she plays female dogs on campus, and sometimes she acts as an open slut in the city! Tohka’s embarrassment also accelerates in the lively gallery! Touka and her Kokou are steadily defeating her enemies. Finally cornering her last opponent, she triumphantly launches a battle. “Come on Touka-chan, get fucked like always!” They don’t know yet. The fear of the final enemy… You can’t stop playing perverted monsters!? Charge up your magical energy with shame and pleasure! I might not be able to cancel my transformation from being an exposed magic college student?

A hentai version of the famous “Journey to the West” where Goku & co are big breasted babes.

Based on the game by Selen.
A long time ago, the Rindo Clan was cursed by a vengeful spirit so that no male children would ever be born. To counter the curse, every three generations, the Rindo must beget children with a family possessing strong spiritual energy. Ever since that day, the Higetsu family have been important and well-treated servants of the Rindo. It is their duty to mix their bloodlines every three generations with that of the Rindo heir.
Time passed and the practice continues to this day. The current heir is Naoto whose fiancee, Suzune, passed away in an accident. Now, he is required to find a replacement.