The Forest of Pregnancy ~The Elf's Millennium Flesh Toilet Chronicle~

A clan of elves lives peacefully in the forest.
One day, a horde of monsters attacks from outside.
The elves fight desperately to protect their village.
If they don't, their fate will be tragic.
 
A traditional fantasy tower defense game.
Use coins to place and strengthen elves and protect their homeland from the lustful monsters.
Earn coins to acquire erotic pixel art in the game, which can be viewed in Gallery Mode.

Alfhelm is a world of elves where only females exist.
With their Holy Tree withering away, the elves faced the threat of extinction. Guided by divine revelation, they summoned a savior from another world - the protagonist.
Even while the elves and the dark elves were at war, the protagonist continued having babymaking sex with everyone. But Evelyn, feeling uncertainty about their babymaking activities, turned to the elder Nol for advice.
In response, Nol deviced a brilliant plan to make it an utter certainty that the two continued making love. Her plan was to lock the two into a "babymaking room" that they were forbidden to leave until she got pregnant.
Misery, who overheard the plan by coincidence, immediately joined in. With Evelyn wanting to serve her master, and Misery getting excited by the competition itself, the curtain rises on a circumstance where intense babymaking is mandatory.

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.

A hentai game with turn-based battles and a visual novel where you play as a scientist who arrives at an isolated village called Ravenhollow with the intention of writing your doctoral thesis on anomalous phenomena and mythological creatures. Your goal is to scientifically observe the strange inhabitants of the area: vampires, shapeshifters, werewolf girls, and other entities that seem to come from a dark dream. Upon arrival, you meet a mysterious young woman named Viernes13, who seems to know too much about the village.
Viernes13 tells you about the Heart of Lugrenwald, a forest that no one has crossed and returned sane.
Explore this intriguing story as you meet the village girls, win their hearts through dates and gifts, and have sex with them.

Both the story and the gameplay have leveled up a lot since the previous game "Iris Action"!