Planet Lust

The heroine of this story, Ayane is an alien girl from "The Pregnancy Planet".
She crashes into the protagonist's laboratory along with her space capsule.
Learning that Ayane's purpose is to come to Earth for mating and reproduction, the protagonist wholeheartedly offers his assistance.

Emma, his childhood friend, is chosen as the "Saint," the one tasked with defeating the Demon King.
He's supposed to travel with her as her bodyguard and save the world in a cool way—
But along the way, a woman named Grace becomes a companion who proves to be far more reliable?
Furthermore, she discovers his secret...?
This is an RPG that's closer to a story, eliminating elements like complex dungeon exploration, item collection, and random monster encounters.
During their journey, the protagonist, while stubbornly resisting the resourceful Grace, gradually begins to feel lust for her.
Also, after a certain incident, Grace begins to "take care" of him regularly...

Join the sensual world of Lust’s Cupid, as you romance your way towards your own personal harem!
 
Lust’s Cupid is a simulation game where you have free control of your character through multiple luscious sex scenes, with a wide range of customizations for you and your partners, allowing you to build your own dream pair.
 
Want to fully explore all Lust’s Cupid has to offer? In Sandbox you have full access to all features and customizations packaged with the base game, allowing you for total control of your experience.
 
Enjoy our character pool or make your own to fully enjoy the pleasures we have prepared for you!

Priest Mira must survive from the monsters that suddenly attacked the castle.
With her attractive body, Those monsters kept her as a toy in the deepest part of the castle.
Mira knew that underneath the castle there had a path that must take her to the cathedral.
However, it's not easy to escape from them.
She needs to hide from the monsters and solve puzzles to escape or become their toy for the rest of her life...

To prove to the world her geniality, Sibela has created a lewd serum capable of releasing all creatures' horniness. However, she is not the only one with this goal; a rival has shown her way. Can you help Sibela earn the title of the biggest slut scientist on the planet?