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.

If either sibling gets caught by an enemy...

Both playable characters have their own H-scenes.

The underground area is a Metroidvania-style map

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.

Open-ended exploration across a vast map

- 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...?!