Doki Doki Sex Education

Yuga and the dark elf Ruvi are the talk of the mercenary guild.
As lovers and partners, the two lead busy yet fulfilling lives, but a job they accepted in the port town of Nist befalls them with misfortune.
A moment of carelessness on Ruvi’s part causes her to blow up some research equipment owned by the client, leaving her with the responsibility of paying 1 million yen in compensation.
While encouraging Ruvi, who is feeling deeply remorseful for his mistake, Yuga warns him, “Don’t do something stupid like selling your body, okay?”
However, as Ruvi gazes at Yuga, a question arises in his mind.
“What exactly does ‘selling your body’ mean?”
When Yuga asks more about this discrepancy, he learns that to dark elves, sex is solely for the purpose of reproduction, and they have no understanding of sex for pleasure or to make money. Up until now, Ruvi had always wondered if having sex with Yuga was pointless if he was going to use contraception.
The difference in values between them, which they had unexpectedly discovered, gave Yuga a headache.
But then, with a look on her face as if she had just come up with a brilliant idea, Ruvi said to Yuga, “How much do you think my body would sell for?”
His beloved lover said she wouldn’t mind having sex if it would help raise compensation.
“That’s absolutely not okay!” Yuga replies hastily, but he imagines Ruvi in the arms of another man and is drawn to a strange sense of immorality.

Doki Doki Sharky Days is a casual top-down action game featuring charming Shark Girls.
As a baby Kraken, challenge four Shark Girl heroines and unlock heart-pounding moments through victory.

A hentai health checkup simulator! Examine her body in this "health checkup" game! 
 
The heroine, Nana Tanaka, who has an easily swayed personality, gradually drowns in shame and pleasure as her sensitive parts like her nipples and clitoris are carefully “examined”…

Clone Yourself and Get Girls into a Knot! Use Sex Ed to Train Them in BDSM and Do Whatever You Want
The concept of chastity has been turned on its head, transforming the world into one where girls are eager to have sex with men!
In this world, it’s perfectly acceptable to have sex with students as part of sex ed. In fact, getting them pregnant is the best outcome!?
A man who becomes the sex ed teacher spends his days getting his students pregnant. Then a transfer student arrives—a girl who, despite her innocent appearance, is actually a masochistic slut who thrills on BDSM training! Make her experience her first period, then keep breeding her until she gets pregnant!

To investigate the organization, Yakumo infiltrated one of its bases—a brothel.
But the organization already knew who she was.
Under the guise of work, they subjected her to increasingly lewd tasks, all part of a plan to mold her into a double agent through a twisted form of pleasure conditioning.
And so, Yagumo found herself trapped and manipulated, with no way out…