NTR Dungeon of Twisted Common Sense

A quiet, academically gifted girl.
Contrary to her gentle appearance, she possesses a strong sense of justice.
She also has a stubborn side, finding it difficult to change her mind once she believes something is right.
She believes that “everything should be approached seriously and diligently,” and often clashes with those around her by forcing this belief on others.
Of course, anything “perverted” is out of the question for her…
But her earnestness is being taken advantage of by the manager (you)…

Walt and Anita are childhood friends and lovers.
They come to a frontline base in the west to find the Legendary King's Sword.
However, they first come across a guy called Cory, a high-level adventurer
who tries to force Anita into becoming his woman...
"I'll definitely reform you and protect Anita!"
"Hehe, let me see if you're all talk!"
And so begins the battle for the woman he loves!

When a mysterious package arrives from his friend, Sakura, the protagonist opens it—only to be instantly teleported into an alternate dimension ruled by a succubus.
They aren’t alone. A crowd of men and women are trapped alongside them, and the succubus issues a twisted ultimatum: conquer her dungeon, or stay trapped forever. To make matters worse, she has branded every female captive with a cursed Crest of Lust.
Time is running out. If they don’t escape quickly, the curse will take over, driving the women into an insatiable frenzy for sex until they permanently transform into succubi. The protagonist must fight through the dungeon to clear the curse and save Sakura from this fate.

The protagonist happens to get his hands on a common sense alteration smartphone. Using the power of that app, he alters his little sister’s common sense, engaging in various erotic pranks and sexual acts in this daily life simulation game.
In this work, you can spend summer vacation days together with your little sister. Every day, you can engage in wholesome communication with her, such as conversing and skinship. On top of that, by adding new common sense alterations, various erotic choices will become available as well. Use the power of the common sense alteration app to spend a debauched summer vacation with your little sister!!

Nana, a woman locked up for a crime she didn't commit, makes her way through the dimly lit prison and a vast underground area with only a flashlight to guide her as she tries to escape.
Rumor has it that the prison is home not just to humans like guards and inmates, but to nonhuman monsters as well...
Shake off your pursuers by hiding, or by jumping and fighting your way past them.
Check anything that looks suspicious, like toilets or holes in the wall that might be shortcuts, and you'll find all sorts of surprises.
Nana's brother comes to visit her in prison, and you can play as him, too.
Work together as siblings, one inside the prison and the other outside, to get Nana out.
Both playable characters have their own H-scenes.
In the underground area, characters appear smaller on screen than in the prison area, and the gameplay becomes more action-oriented.
During H-scenes underground, however, the camera zooms in on the characters, so you can enjoy the pixel H-animation in sharper detail.
- Raise Nana's base stats by having lots of sex.
- Upgrade your weapon early and take down tough enemies.
- Boost your jumping power to clear walls you couldn't get over before.
- Take detours to hunt for hidden rooms and treasure.
Explore the map however you like.
The ending you reach depends on the choices you make.
Can you really make it out of this twisted prison safe and sound?
Or does a totally unexpected fate await you...?!
* If you're not so good at games, you can force-unlock scene replays in the gallery, and assist features become available after a set number of failures in difficult areas.