You woke up in a strange place. There seems to be a keypad & button. You have subconscious knowing of what it is somehow. The code is ACDA. If you decide to press the button and enter the code, spikes will drop down on Nata Onna and she'll die. She's right behind the door in front of you, waiting for you to open the door silently. You don't know she's outside the door. All you can see is the next room is empty with metal walls and floor.