The harsh story of two sisters
(English product description provided by the creator)　

Nightmare, an evil army that suddenly visits a peaceful world.
Nightmare kidnapped the girls in this world and remodeled them into nurseries to produce monsters.
At this rate, the world will become Nightmare's ...

At that time !!

The sisters of the magical warrior Lina of spear art and the magical girl Mina of the genius stood up.
Its name is [Twin Stars]

Together with the dreamland fairy Poco, they have defeated numerous Nightmare monsters!
"As long as they are, this world is safe!"
Everyone was supporting the success of the two.

One day……

Lena woke up in a mysterious space.
Lina has no memory of her before she fell asleep ...
Furthermore, from the back, I heard something like Mina's screaming.

What the hell is this space ...
Lina goes deeper into the space to find her sister ...
What I saw there was an incredible sight!

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It is an exhilarating action that you can use powerful magic with simple operations.

Enemy monsters make various erotic attacks and Ryona attacks.

There are incontinence leaks and defecation expressions.

Please see the homepage of this circle for the operation method.
https://mania-ju.site-sample.work/adult/twin-system/

Details of the privilege room are also posted on the circle's website.

Also, since this work is [Part 1], the story is not complete.
Please note that the story will be completed in [Part 2].

If you have a PC with low specifications, the operation may be heavy or it may crash.
It takes about 1 to 2 minutes to start up for the first time, but once you start up, you will be able to enjoy it smoothly after that.

In addition, a video file is included for those who are too heavy to start up or do not operate comfortably.
[Twin Stars Nightmare-Part 1- (Movie version)] (Sold separately) will be the same.

I am also looking for people to provide financial support on Patreon.
With the support of many people, we will be able to create great works faster than ever.
Please help us.

My Patreon ↓↓↓↓
https://www.patreon.com/mania_ju