Succubers! Dark Covenant

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.

Corrupt and take the man's two precious seniors!
 
Rune, a fledgling adventurer, had two precious ladies in his life:
Tisia, the swordswoman;
and Salaphil, the mage.
They're both veteran adventurers, and older sisters the man longs for.

They gently taught him swordsmanship and magic, and also helped him grow as an adventurer,
showing their affection for him.

The man and his kind seniors set out on a highly difficult quest.

But they had no way of knowing their fate!
That high difficulty level quest was not suitable for their stature...
 
The game system is played through card battles.
 
Battle by placing cards from a group of cards called "folders" on a step!

If you win with a stronger card than your opponent's, you attack!
If you lose with a card weaker than your opponent's, you take damage!


But if the cards are not well aligned, you may not be able to win well.
However, the distance advantage system gives you a chance to attack even if you are defeated!
Weak cards have their own uses!
You've got to make the most of your cards and lead your team to victory - are you up to that challenge?

Nam, the swordswoman known as the "Dark Flame," has obtained information about the "Mirage Mansion" and set off to a certain desert to acquire the hidden treasures within. However, unknown dangers await her there.
 
This is a deck-building roguelike RPG. Collect cards and items to create more powerful decks and combos as you challenge the deepest parts of the mansion. There are multiple branching paths in each stage and within the stages themselves. Events and enemy placements are random, even in the same spot. The game features replayability elements. If you are defeated, you can restart from just before the battle. If you find a battle impossible to win, you can restart from the beginning while carrying over some of your gold and levels.