Synopsis
** Story
The four sisters have captured a life form that can generate crystals of energy on a
resource-heavy planet.
On the way back to their home planet, an emergency occurs in the spacecraft.
Meryl sees her beloved sisters being attacked
by space monsters in the shower room.
“Oh … it’s going to be put inside again! Meryl, help me!”
Her beautiful blue sisters continue to have reproductive fluid poured
inside them over and over again by space monsters.
“I need to help my sisters!”
And so Meryl stands up to kill the space monsters and save her beloved sisters.
** Sex Scenes
Numerous different types of fucking (invader sex) occur in the close quarters of a
space ship!
Space monster sex is the best in the universe! !
Space monsters have evolved to prosper and leave seeds in a harsh and vast universe,
and have the ability to impregnate relentlessly.
If you lose a battle with a space monster and get caught,
you will be used as a tool for the monster to reproduce.
** Sex Scene Commitment
If you don’t handle it quickly, a monster will be born!
Don’t miss the part where blue skinned aliens are attacked by space monsters and become pregnant.
Numerous event scenes that are sure to get fans of blue skin excited.
** Game Tips
Make sure to search!
Explore the spaceship where the trouble occurred while creating weapons by combining materials.
Even if you lose to a powerful monster, you will not give up.
Powerful space armor can be obtained by collecting materials and making more powerful armor,
You can challenge the monsters as many times as you want.
** Alien Heroine
Name: Meryl
Age: ? ? ?
Family Composition: youngest sister
Personality: Poor emotional expression, but sensibility is on par with people. Courageous enough to challenge the space monsters for her sisters.
Hobbies: Studying energy with her sisters.
Special Skill: Doing whatever it takes!
Favorite Word: I need to help my sisters!
Least Favorite Word: UFO
Favorite Things: Her sisters, her sisters’ underwear, her sisters’ bed
Dislikes: Horny monsters
Birthplace: She grew up as the youngest sister of an alien family who navigates the planet and collects energy to solve their home world’s energy crisis.
| Circle | Melon Pants |
| Tags | R18, Role-playing, Music, Application, English |
| Price | 990JPY |
Editorial Review
Erotic Invader plants itself squarely in the turn-based tactical RPG subgenre, where combat outcomes directly determine sexual narrative progression. This is familiar mechanical territory in adult gaming, but the execution here leans into a specific appeal: involuntary transformation and defeat-as-content within a structured combat loop.
What distinguishes this work is its commitment to the “invader” premise as both thematic anchor and gameplay consequence. The space monster threat isn’t window dressing—losing battles carries explicit narrative weight, with the player character and her sisters facing systematic reproductive assault as a failure state. The focus on multiple victims and repeated violations (emphasized in the synopsis’s “over and over again” phrasing) signals this work is built around a particular fantasy: collective vulnerability and the stacking of sexual encounters across different characters. The inclusion of music and application tags alongside the RPG framework suggests attention to audiovisual presentation, potentially elevating production quality beyond minimal effort doujin standards.
The sister dynamic adds another layer. Meryl’s motivation to rescue captured family members creates emotional scaffolding that many adult RPGs skip entirely. Whether that narrative framing serves as meaningful character investment or merely justification for the central content depends on execution, but it’s a deliberate structural choice rather than an afterthought.
The mechanics emphasize progression through combat encounters with clear stakes. Players evaluating this should understand upfront: this is a game where losing, specifically and repeatedly, is the primary access point to sexual content. There’s no negotiation or seduction pathway—the sexual scenarios emerge directly from tactical failure against increasingly demanding opponents.
This appeals precisely to players seeking involuntary content within an RPG structure, where monster design, combat difficulty, and narrative consequence all reinforce the central fantasy. It’s niche work with a clear design philosophy executed without apology.
Official English version available ↓
Get “Erotic Invader” on DLsite
English Version → Free TrialJapanese Original
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Related Tags:
R18 | English | Application | Music | Role-playing
