25c -Sono Hako wa Shoujo no Himei o Morasanai- by Lucha Libre - Adult Sex Game

Where the hell am I?
I was lying in an unfamiliar room with my brother Yuki.
A square room with tiles covered in patterns that look like symbols.
There are no windows in the room, only a door.

I would never have come to this place of my own free will.
If so, then I can only think that someone forced me to come here.

"As far as I remember, I was walking around the hospital with Yuki, and then I went into...
"But what happened? I don't remember...
"It's like the memory has been completely removed from my head."
"The only thing I want is to run away from here."

"I can't remember what happened to me. We have to get out of here as soon as possible."
Then I pulled Yuuki's hand and went to the door...