The Avenger's Dark Deal

Welcome to the Year 2200
 
"Spring into action, supersonic Sylpheed."

Become the owner of the female android "AI-deal", and prepare for high-stakes drama and high-speed action, all rendered in real-time 3D.
 
 
 
 

Driven by hidden instincts, the protagonist and his schoolmate enter a pact with a group of powerful Succubers, roaming the streets to gather energy. Will they fulfill their contract and achieve their ultimate dreams?

One day, Tachio, an ordinary office worker, is suddenly transported to another world overrun with dark monsters known as Yamimon.
In this strange world, he is attacked by Yamimon, but is saved by the beautiful dark hunter Kurenai, with striking red hair and large breasts.
However, the moment he comes into contact with Kurenai,
he fuses with her special battle suit, Gear.
Thus, Tachio fights alongside her as her suit during battles,
while searching for a way to return to his original world (while being made to take care of everyday things at home).

Our story starts when peace has finally taken hold of the world after the war. The former mercenary and dark elf Fornelia, battle-worn and looking for a place to die, saves a young man named Ruse from a monster attack.

Bounty hunter Tifania visited a remote village to investigate the disappearance of local girls.
There are rumors about the incident related to local wicked activities.
There, crazy villagers and mysterious creatures aiming at Tifania attack one after another.