My Sister is a Transformation Heroine! (Rabid Fang)

Synopsis

In 20XX, a UFO crashes into Tokyo.

Massive numbers of monsters emerge from the spacecraft, sending the city into chaos.

Yuuna, a tsundere female high school student who constantly bickers with her older brother, is forcibly transformed by a mysterious alien named Maru, becoming Universe Layer (ULV).

Suddenly thrust into battle against hostile extraterrestrials, Yuuna is bewildered but gradually finds her resolve—after all, Earth itself is in crisis, and she’s told she has what it takes. However, the enemies’ attacks far exceed her imagination.

The insidious grasp of lustful aliens closes in on the tsundere sister!

[GAME SYSTEM]

• H-Battle equipped transformation heroine RPG

• Transformation possible through encounters, attacks, and guarding

• H-Battles may trigger during encounters, attacks, and guarding while transformed

• Transformations and H-Battles occur at various moments during combat

[H-BATTLE]

• H-Battles utilizing the unique traits of lustful aliens occur during combat, starting the next turn

• H-Battles are erotic encounters lasting 1 to ? turns

• Enemies become aroused and attack erotically during combat

• Extended H-Battles display longer intimate scenes of ULV being violated

• As turn counts increase, H-scenes become increasingly explicit

• Continuation rates range from 30% to ??% (additional draws occur on each turn with continuation confirmation effects)

• Continuation rates change based on held items and ULV’s status

• If enemies stop mid-attack and H-Battle ends, you can Retry (no step cost)

• Retry mode increases continuation rates