A boy who lost both his parents to succubi lives together with his older sister.

Days after hearing rumors that a grand party will be held in a far-away castle, his sister suddenly disappears.
At the same time, succubi start appearing in large numbers, looking to turn humans into their food.
All on his own, the protagonist sets out to find his sister, and will face off against countless succubi to finally get to her.

*A reverse-rape BFRPG (Battle Fuck RPG)- All characters have a reverse rape scene!
If you cum 3 times while fighting a succubus, she'll drain your semen and you'll get a defeat scene.
If you lose to the same succubus twice, you'll get the defeated ending!
Includes lots of dominating females, and voluptuous breast play!

* Game difficulty can be chosen.

Full unlocking feature, Reminiscence Mode, and quick progression items all present!

*The trial version has some differences from the final product.
*Please test the trial version to test for compatibility first. Save data can be transferred.

Further details can be found at:
Blog: http://625plus.blog.fc2.com/
Ci-en: https://ci-en.dlsite.com/creator/1530

Update information and announcements can also be found at the above links.