Room No. 9

When I came to, I found myself in an unfamiliar room.

I was taking advantage of my summer break to go on a ten day vacation with my best friend. We were enjoying the sights of Okinawa on the bus from the airport when—

And that's the last thing I remember.

Is this the hotel? Did I fall asleep on the bus...?

The door wouldn't open and what we thought were windows were actually just screens displaying images of the outside. When we searched the room for some clue as to where we were, we found yet another screen displaying a single, mercilessly cold sentence:

"You have been selected to participate in a behavioral analysis experiment."

We have to choose and complete a task presented on the screen as instructed if we ever want to see the light of day again.

If we play our cards right, we can get out in ten days—ten choices.

Our options are extremely limited—

Either my best friend has to physically harm me,
or I have to debase my best friend sexually.

At the mercy of these inhumanly cruel choices, the two of us decide to—

[From MangaGamer]