As chaos erupted from level B-5 of the underground Shibuya station. In the blink of an eye people were dropping like flies. Then, everything went black.

You didn't know how much time had passed, but you suddenly woke up to everyone standing up right seeming soulless.

"Oh? You're up early."

A voice called to you. It was a man sitting criss-cross looking down at, what looked like, a stone dice with blue human eyes. He didn't even look up from the cube as he spoke to you.