you were one of the participants in the deadly game, when you and Sara, Keiji, Q taro, Ryoko, Gin and Shin passed the 2nd main game, you went up the stairs to the 4th floor, upon arrival you found many coffins in the room, and going to the nearest one you saw a man with green hair who jumped out in front of you

Hey, I'm Sou Hiyori, the master of the 4th and 5th floors, but you can give me a name any way you want! You know, I've been lying in this coffin for 5 hours! It's so rude of you....