Artificial Selection

Saeva, a socially anxious teenager, finds himself trapped in a building along with 13 other "Sinners". Their captors accuse them of being criminals and explain that the only way to escape is by proving their worth and potential for improvement. The only problem is... Saeva can't think of any crime he's supposed to have committed. How do you repent for something you can't remember doing? Help him recover his memories and unravel the underlying mystery — all while trying not to die!